{"title":"MarinePure","description":"\u003cp\u003eSurface area is the whole story with MarinePure, a ceramic biological filter media made in Buffalo, New York by CerMedia. The material is an inert aluminosilicate ceramic fired above 1000 degrees, with open, interconnected pores that give nitrifying bacteria enormous room to settle while still letting water pass through the piece. That handles ammonia and nitrite, and in the low oxygen centre of a larger block it can also help lower nitrate, though CerMedia notes that depends on the system. We stock the Block and Plate for sumps, Spheres and PODs for media baskets and canisters, the pellet sized GEMS and freshwater Fresh GEMS for hang on and nano filters, the Vault, and a mesh bag for loose pieces.\u003c\/p\u003e\u003cp\u003eRinse new media in tank water rather than tap water, and add it to an established filter instead of swapping everything at once.\u003c\/p\u003e","products":[{"product_id":"marinepure-fresh-gems-50g","title":"MarinePure Fresh GEMS 50g","description":"\u003cp\u003e\u003cstrong\u003eUltra-porous ceramic biomedia sized for nano and small canister filters.\u003c\/strong\u003e MarinePure Fresh GEMS are small ceramic pellets made by CerMedia (USA) from the same aluminosilicate ceramic as the full-size MarinePure Spheres and Plates, fired above 1,000°C to create a rigid, open-pore structure. Each pellet is about 19 mm (¾\") across, so the 50 g box suits hang-on-back and small canister filters on freshwater community, planted and tropical tanks, where a full block or sphere box would be overkill.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-porous ceramic\u003c\/strong\u003e — an open-pore structure gives bacteria far more surface to colonise than a plastic bio-ball or ring of the same size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandles the nitrogen cycle\u003c\/strong\u003e — the porosity is designed to support ammonia- and nitrite-processing bacteria, with nitrate reduction in the low-oxygen pore centres over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResists clogging\u003c\/strong\u003e — the ceramic structure holds its shape, so flow through the media stays consistent between cleans, unlike foam or floss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable\u003c\/strong\u003e — rinse in tank water at a water change rather than replacing on a schedule.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFills odd-shaped spaces\u003c\/strong\u003e — loose pellets pack into media baskets and hang-on-back trays that a block or plate can't reach.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMarinePure (CerMedia, USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003ctd\u003e50 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePellet size\u003c\/th\u003e\n\u003ctd\u003eApprox. 19 mm (¾\") diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eInert aluminosilicate ceramic, fired above 1,000°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOpen porosity\u003c\/th\u003e\n\u003ctd\u003e80–90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface area density\u003c\/th\u003e\n\u003ctd\u003eApprox. 1.3–1.7 m² per gram (CerMedia's published material rate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal surface area, this box\u003c\/th\u003e\n\u003ctd\u003eApprox. 65–85 m² (700–915 sq ft), calculated from the rate above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFilter compatibility\u003c\/th\u003e\n\u003ctd\u003eCanister, hang-on-back and internal filters with a media basket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhich GEMS box do I need?\u003c\/h3\u003e\u003cp\u003eGEMS come in two sizes, and the right one depends on the filter as much as the tank.\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eSurface area\u003c\/th\u003e\n\u003cth\u003eCerMedia bioload guidance\u003c\/th\u003e\n\u003cth\u003eBest suited to\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFresh GEMS 50 g\u003c\/td\u003e\n\u003ctd\u003eApprox. 65–85 m² (700–915 sq ft)\u003c\/td\u003e\n\u003ctd\u003eTanks up to 40 US gal (150 L) — CerMedia's own filter-sizing guidance for this pack\u003c\/td\u003e\n\u003ctd\u003eFreshwater community, planted and tropical tanks in small canisters or hang-on-back filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGEMS 90 g\u003c\/td\u003e\n\u003ctd\u003eOver 135 m² (1,450 sq ft)\u003c\/td\u003e\n\u003ctd\u003eUp to 70 US gallons (265 L)\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine nano and small tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eCerMedia rates the two GEMS packs separately rather than one being scaled from the other: tanks up to 40 US gallons (150 L) for the Fresh GEMS 50 g pack, and up to 70 US gallons (265 L) for the 90 g box. Both figures come from CerMedia's own site.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e freshwater community, planted and tropical aquariums running a canister, hang-on-back or internal filter with a media basket small enough for loose pellets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e the sole biological media on anything beyond a small tank — for larger systems, MarinePure Spheres, PODs or a Plate carry far more surface area per dollar. Not a mechanical or chemical media either — it won't polish water or remove odours on its own.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eRinse GEMS in tank water or dechlorinated water at a water change — never under tap water straight from the mains, since chlorine and chloramine will knock back the bacterial colony. There's no fixed replacement interval; the ceramic doesn't wear out, so GEMS keep working until the filter basket is due for a clean.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarinePure Mesh Bag (Small)\u003c\/strong\u003e — keeps loose GEMS contained and easy to lift out for a rinse.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA water conditioner\u003c\/strong\u003e — dechlorinate top-up water before it reaches the filter, so new water doesn't strip the bacterial film.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn ammonia and nitrite test kit\u003c\/strong\u003e — confirm the media is cycled before stocking up.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eMarinePure Fresh GEMS has no stated wear-out life from CerMedia — it's ceramic, not a consumable cartridge — and any manufacturing fault is covered by your rights under Australian Consumer Law in addition to any retailer or manufacturer terms. Standard parcel freight applies.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eCan I mix GEMS with other filter media in the same basket?\u003c\/h4\u003e\u003cp\u003eYes. GEMS are commonly run alongside mechanical floss or sponge for particles, and chemical media such as carbon for odour and colour, as long as the basket still lets water pass through the GEMS rather than around them.\u003c\/p\u003e\u003ch4\u003eDo I need to cycle a filter before adding fish?\u003c\/h4\u003e\u003cp\u003eYes — GEMS need time for bacteria to colonise the ceramic before they're doing useful biological work. Run the filter on an established tank's water, or fishless-cycle with an ammonia source, before adding livestock.\u003c\/p\u003e\u003ch4\u003eWill GEMS work in a marine tank?\u003c\/h4\u003e\u003cp\u003eThe ceramic itself is fresh and marine safe, but CerMedia markets the Fresh GEMS 50 g pack specifically for freshwater use. For marine or reef systems, the 90 g GEMS box is the one CerMedia rates for marine as well as freshwater.\u003c\/p\u003e\u003ch4\u003eHow long does a box of GEMS last?\u003c\/h4\u003e\u003cp\u003eIndefinitely, with a periodic rinse. Ceramic biomedia isn't a wear item like filter floss — replace it only if it's physically damaged.\u003c\/p\u003e","brand":"MarinePure","offers":[{"title":"Default Title","offer_id":54773850308899,"sku":"725342","price":23.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/marinepure-fresh-gems-50g-957795.webp?v=1790230840"},{"product_id":"marinepure-mesh-bag","title":"MarinePure Mesh Bag","description":"\u003cp\u003e\u003cstrong\u003eThe tidy way to run loose MarinePure media in a sump or filter basket.\u003c\/strong\u003e The MarinePure Mesh Bag is a durable, non-toxic polyester mesh bag with a drawstring closure, made to hold MarinePure biomedia — Spheres, GEMS or PODs — in a canister filter, sump or hang-on-back basket. It's freshwater and marine safe, and comes in three sizes to match how much media you're running.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawstring closure\u003c\/strong\u003e — cinch it shut and the media stays put, even in high flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolyester mesh\u003c\/strong\u003e — open enough for water to pass freely through the media inside, without letting loose pellets or spheres escape into the sump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLift-out convenience\u003c\/strong\u003e — pull the whole bag for a rinse at a water change instead of fishing loose media out of a basket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and marine safe\u003c\/strong\u003e — suits reef sumps as well as freshwater canisters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree sizes\u003c\/strong\u003e — sized to the amount of MarinePure media you're running, from a small GEMS box to a full box of Spheres.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMarinePure (CerMedia, USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolyester mesh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClosure\u003c\/th\u003e\n\u003ctd\u003eDrawstring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSizes\u003c\/th\u003e\n\u003ctd\u003eSmall (10 × 16 cm), Medium (20 × 30 cm), Large (25 × 38 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhich size do I need?\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003cth\u003eBest suited to\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmall\u003c\/td\u003e\n\u003ctd\u003e10 × 16 cm\u003c\/td\u003e\n\u003ctd\u003eA GEMS box or a small handful of PODs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003ctd\u003e20 × 30 cm\u003c\/td\u003e\n\u003ctd\u003eA 1.9–3.8 L box of Spheres, or a 3–pack of PODs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLarge\u003c\/td\u003e\n\u003ctd\u003e25 × 38 cm\u003c\/td\u003e\n\u003ctd\u003eLarger volumes of loose Spheres in a sump or big canister\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e containing MarinePure Spheres, GEMS or PODs in a sump, canister or hang-on-back filter, in freshwater or marine setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e fine mechanical filtration — the mesh is designed to contain biomedia, not to trap fine particles like floss or polyester pad does.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eRinse the bag along with the media inside it, in tank water or dechlorinated water, at a water change. The mesh itself has no fixed replacement interval — replace it if the drawstring fails or the mesh tears.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarinePure Spheres or GEMS\u003c\/strong\u003e — the media this bag is built to contain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarinePure PODs\u003c\/strong\u003e — the Small and Medium bags suit a 3-pack.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eAny manufacturing fault is covered by your rights under Australian Consumer Law in addition to any retailer or manufacturer terms. Standard parcel freight applies.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eCan I use one bag for a mix of Spheres and PODs?\u003c\/h4\u003e\u003cp\u003eYes — the mesh bag doesn't care what MarinePure media is inside it, only how much room it takes up. Pick the size based on volume, not media type.\u003c\/p\u003e\u003ch4\u003eWill the mesh restrict flow through the media?\u003c\/h4\u003e\u003cp\u003eSome, compared to loose media sitting directly in a basket, but the mesh is open enough that it's not a meaningful flow restriction in normal sump or canister use, and water still flows through freely to reach the media inside.\u003c\/p\u003e","brand":"MarinePure","offers":[{"title":"Small 10x16cm","offer_id":54773850603811,"sku":"725341","price":9.95,"currency_code":"AUD","in_stock":false},{"title":"Medium 20x30cm","offer_id":55335328022819,"sku":"725340","price":10.95,"currency_code":"AUD","in_stock":false},{"title":"Large 25x38cm","offer_id":55335328055587,"sku":"725339","price":12.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/marinepure-mesh-bag-43126913401123.webp?v=1790237816"},{"product_id":"marinepure-gems-90g","title":"MarinePure GEMS 90g","description":"\u003cp\u003e\u003cstrong\u003eThe GEMS box CerMedia actually rates a bioload figure for.\u003c\/strong\u003e MarinePure GEMS 90 g are small ceramic pellets made by CerMedia (USA) from the same aluminosilicate ceramic as the full-size MarinePure Spheres and Plates, fired above 1,000°C to create a rigid, open-pore structure. Each pellet is about 19 mm (¾\") across. Unlike the 50 g Fresh GEMS pack, this 90 g box is rated by CerMedia for both freshwater and marine nano and small tanks, and comes with a published bioload figure to size a filter against.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-rated bioload\u003c\/strong\u003e — CerMedia states this box supports tanks up to roughly 70 US gallons (265 L), the only GEMS pack size with a published figure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver 135 m² (1,450 sq ft) of surface area\u003c\/strong\u003e — packed into a 90 g box, using the same ultra-porous ceramic as the full-size Spheres.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and marine safe\u003c\/strong\u003e — unlike the 50 g Fresh GEMS pack, this size is rated for reef and marine nano tanks as well as freshwater.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResists clogging\u003c\/strong\u003e — the ceramic structure holds its shape, so flow through the media stays consistent between cleans.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable\u003c\/strong\u003e — rinse in tank water at a water change rather than replacing on a schedule.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMarinePure (CerMedia, USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003ctd\u003e90 g (3.2 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePellet size\u003c\/th\u003e\n\u003ctd\u003eApprox. 19 mm (¾\") diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eInert aluminosilicate ceramic, fired above 1,000°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOpen porosity\u003c\/th\u003e\n\u003ctd\u003e80–90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal surface area\u003c\/th\u003e\n\u003ctd\u003eOver 135 m² (1,450 sq ft) per box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated bioload\u003c\/th\u003e\n\u003ctd\u003eUp to 70 US gallons (265 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFilter compatibility\u003c\/th\u003e\n\u003ctd\u003eCanister, hang-on-back and internal filters with a media basket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhich GEMS box do I need?\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eSurface area\u003c\/th\u003e\n\u003cth\u003eCerMedia bioload guidance\u003c\/th\u003e\n\u003cth\u003eBest suited to\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFresh GEMS 50 g\u003c\/td\u003e\n\u003ctd\u003eApprox. 65–85 m² (700–915 sq ft)\u003c\/td\u003e\n\u003ctd\u003eNot published by CerMedia for this pack size\u003c\/td\u003e\n\u003ctd\u003eFreshwater community, planted and tropical tanks in small canisters or hang-on-back filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGEMS 90 g\u003c\/td\u003e\n\u003ctd\u003eOver 135 m² (1,450 sq ft)\u003c\/td\u003e\n\u003ctd\u003eUp to 70 US gallons (265 L)\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine nano and small tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eIf you're stocking a marine nano or reef tank, or you simply want a bioload figure printed on the box rather than working it out yourself, the 90 g pack is the one CerMedia backs with a number.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e freshwater and marine nano and small tanks up to around 70 US gallons (265 L), run through a canister, hang-on-back or internal filter with a media basket that takes loose pellets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e larger systems as the sole biological media — past roughly 70 gallons, MarinePure Spheres, PODs or a Plate carry more surface area per dollar and per litre of basket space. Not a mechanical or chemical media — it won't polish water or remove odours on its own.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eRinse GEMS in tank water or dechlorinated water at a water change — never under tap water straight from the mains, since chlorine and chloramine will knock back the bacterial colony. There's no fixed replacement interval; the ceramic doesn't wear out, so GEMS keep working until the filter basket is due for a clean.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarinePure Mesh Bag (Small)\u003c\/strong\u003e — keeps loose GEMS contained and easy to lift out for a rinse.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA marine or reef salt mix\u003c\/strong\u003e — if this box is going into a new marine nano setup rather than an existing tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn ammonia and nitrite test kit\u003c\/strong\u003e — confirm the media is cycled before stocking up.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eMarinePure GEMS 90 g has no stated wear-out life from CerMedia — it's ceramic, not a consumable cartridge — and any manufacturing fault is covered by your rights under Australian Consumer Law in addition to any retailer or manufacturer terms. Standard parcel freight applies.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWhat's the difference between the 50 g and 90 g GEMS boxes?\u003c\/h4\u003e\u003cp\u003eBoth use the same ceramic pellets. The 90 g box has more surface area, carries a published bioload rating of up to 70 US gallons (265 L), and is the one CerMedia rates for marine and reef tanks as well as freshwater. The 50 g Fresh GEMS box is freshwater-only and doesn't come with a stated bioload figure.\u003c\/p\u003e\u003ch4\u003eCan I run GEMS in a reef tank?\u003c\/h4\u003e\u003cp\u003eYes — this 90 g pack is fresh and marine safe and suits nano reef setups where a full MarinePure Sphere box would be more media than the sump or filter can hold.\u003c\/p\u003e\u003ch4\u003eDo I need to cycle a filter before adding livestock?\u003c\/h4\u003e\u003cp\u003eYes. GEMS need time for bacteria to colonise the ceramic before they're doing useful biological work. Run the filter on established tank water, or fishless-cycle with an ammonia source, before stocking up.\u003c\/p\u003e\u003ch4\u003eHow long does a box of GEMS last?\u003c\/h4\u003e\u003cp\u003eIndefinitely, with a periodic rinse. Ceramic biomedia isn't a wear item like filter floss — replace it only if it's physically damaged.\u003c\/p\u003e","brand":"MarinePure","offers":[{"title":"Default Title","offer_id":54773874065699,"sku":"102665","price":42.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/marinepure-gems-90g-505827.webp?v=1790230840"},{"product_id":"marinepure-block-8x8x4","title":"MarinePure Block 8x8x4\"","description":"\u003cp\u003e\u003cstrong\u003eThe nitrate-busting brick.\u003c\/strong\u003e The MarinePure Block is a 20 × 20 × 10 cm (8\" × 8\" × 4\") slab of ultra-porous aluminosilicate ceramic biomedia made by CerMedia (USA). Its deep interior is specifically designed to develop the anaerobic zones where denitrifying bacteria live — so it removes ammonia, nitrite \u003cem\u003eand\u003c\/em\u003e nitrate, something ordinary bio-media can't manage. CerMedia rates it at up to 500 US gallons (around 1,900 L) for general ammonia and nitrite removal, dropping to 150 US gallons (around 570 L) where denitrification is the goal.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemoves ammonia, nitrite and nitrate\u003c\/strong\u003e — the deep anaerobic core actively reduces nitrate in passive or low-flow placement, not just ammonia and nitrite like ordinary bio-media.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreater than 80% open porosity\u003c\/strong\u003e — water can be poured straight through it; CerMedia describes the internal surface area as roughly 1,000 times that of standard plastic bio-media, though it doesn't publish an absolute square-footage figure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThin Bio-Film Technology\u003c\/strong\u003e — CerMedia's open, interconnected pore structure keeps bacterial films thin, which resists clogging compared with denser media.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks as a live rock substitute\u003c\/strong\u003e in minimalist reef scapes, or as sump media in any freshwater or saltwater system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasily shaped\u003c\/strong\u003e with a hand saw or coarse sandpaper if you need to fit an odd-shaped sump (wear a dust mask, rinse before use).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInert\u003c\/strong\u003e — won't break down or alter water chemistry over time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminosilicate ceramic, fired above 1,000°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e20 × 20 × 10 cm (8\" × 8\" × 4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePorosity\u003c\/th\u003e\n\u003ctd\u003eGreater than 80% open, interconnected porosity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBioload — ammonia and nitrite removal\u003c\/th\u003e\n\u003ctd\u003eUp to 500 US gallons (approx. 1,900 L) per block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBioload — denitrification (nitrate reduction)\u003c\/th\u003e\n\u003ctd\u003eUp to 150 US gallons (approx. 570 L) per block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eCerMedia (USA), sold under the MarinePure brand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRinse before use to remove shipping dust — a tap-water rinse followed by a tank-water rinse is enough.\u003c\/li\u003e\n\u003cli\u003eFor denitrification, place it somewhere passive: in the sump, under a gravel bed, or built into the reef structure. Flow through the block should be gentle, not forced.\u003c\/li\u003e\n\u003cli\u003eRun mechanical filtration upstream so the block isn't doing double duty as a debris trap, and give it a rinse in tank water every few months if flow through it slows down.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e sumps and filter compartments in freshwater and marine systems wanting ammonia, nitrite and nitrate reduction from one piece of media, and reef scapes using it as a live rock substitute.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e high-flow placements where you specifically want denitrification — the anaerobic core needs passive, low-flow conditions to work.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eSold with CerMedia's standard warranty against manufacturing defects, in addition to the consumer guarantees you're entitled to under Australian Consumer Law. Ships from Nick's Aquarium Oceanarium Terrarium in Brisbane \/ North Lakes, QLD.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow many blocks do I need?\u003c\/h4\u003e\u003cp\u003eSize to your tank's total volume against the denitrification rating of 150 US gallons (570 L) per block if nitrate control is your goal, or the higher 500 US gallon (1,900 L) rating if you only need ammonia and nitrite capacity.\u003c\/p\u003e\u003ch4\u003eDoes it work in freshwater?\u003c\/h4\u003e\u003cp\u003eYes — CerMedia rates the MarinePure Block for both freshwater and marine systems.\u003c\/p\u003e\u003ch4\u003eCan I cut it to fit my sump?\u003c\/h4\u003e\u003cp\u003eYes. It can be shaped with a hand saw or coarse sandpaper. Wear a dust mask while cutting and rinse the block before it goes in the tank.\u003c\/p\u003e\u003ch4\u003eWill it work in high flow?\u003c\/h4\u003e\u003cp\u003eIt will still process ammonia and nitrite, but the anaerobic core that drives nitrate reduction needs passive, low-flow conditions — don't expect denitrification from a block sitting in fast-moving return flow.\u003c\/p\u003e","brand":"MarinePure","offers":[{"title":"Default Title","offer_id":54773874098467,"sku":"100895","price":169.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/marinepure-block-8x8x4-850467.webp?v=1790230840"},{"product_id":"marinepure-plate-8x8x1","title":"MarinePure Plate 8x8x1\"","description":"\u003cp\u003e\u003cstrong\u003eA slim, cuttable sheet of ceramic biomedia for tight spaces.\u003c\/strong\u003e The MarinePure Plate is a 20 × 20 × 2.5 cm (8\" × 8\" × 1\") sheet of ultra-porous ceramic biomedia made by CerMedia (USA), from the same inert aluminosilicate ceramic as MarinePure Spheres and PODs. Where a bag of loose Spheres needs a basket to sit in, the Plate is rigid enough to stand on its own or be cut down with a hacksaw to fit an odd-shaped sump baffle or filter compartment.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAround 534 m² (5,750 sq ft) of surface area\u003c\/strong\u003e — packed into a single 20 × 20 × 2.5 cm plate, using CerMedia's ultra-porous ceramic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCuttable\u003c\/strong\u003e — the ceramic can be cut down with a hacksaw or angle grinder to fit a sump baffle, overflow compartment or an odd-shaped filter box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResists clogging\u003c\/strong\u003e — the rigid open-pore structure doesn't compact the way loose media can, so flow through it stays consistent between cleans.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable\u003c\/strong\u003e — rinse in tank water at a water change rather than replacing on a schedule.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo bag required\u003c\/strong\u003e — rigid enough to sit directly in a sump compartment or media rack without a mesh bag.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMarinePure (CerMedia, USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e20 × 20 × 2.5 cm (8\" × 8\" × 1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eInert aluminosilicate ceramic, fired above 1,000°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOpen porosity\u003c\/th\u003e\n\u003ctd\u003eGreater than 80%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface area\u003c\/th\u003e\n\u003ctd\u003eAround 534 m² (5,750 sq ft) per plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial surface area rate\u003c\/th\u003e\n\u003ctd\u003eApprox. 510 m² per litre (150,000 sq ft per cubic foot) of ceramic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCuttable\u003c\/th\u003e\n\u003ctd\u003eYes — hacksaw or angle grinder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat bioload does it support?\u003c\/h3\u003e\u003cp\u003eCerMedia's own dosing guidance for the MarinePure range is 1 gallon of Spheres, or one full 8×8×4\" Block, per 500 US gallons of aquarium water in active flow for ammonia and nitrite control (roughly 100 US gallons in passive flow, for nitrate reduction). The Plate is a quarter the volume of the Block, and retailer spec sheets that reproduce CerMedia's figures put a single Plate at standalone filtration for tanks up to around 100 US gallons (380 L) — useful as a rough guide, though we'd treat CerMedia's own Block and Sphere dosing rate above as the more authoritative number if you're sizing precisely.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e sump compartments, media racks, and canister or filter boxes with room for a rigid slab of media — freshwater or marine, including reef systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e tight hang-on-back baskets sized for loose pellets — use MarinePure GEMS or PODs there instead. Not a mechanical or chemical media — it won't polish water or remove odours on its own.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eRinse the Plate in tank water or dechlorinated water at a water change — never under tap water straight from the mains, since chlorine and chloramine will knock back the bacterial colony. There's no fixed replacement interval; the ceramic doesn't wear out, so a Plate keeps working until it's due for a clean.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eA sump baffle or media rack\u003c\/strong\u003e — the Plate is rigid enough to slot straight in without a bag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn ammonia and nitrite test kit\u003c\/strong\u003e — confirm the media is cycled before stocking up.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eThe MarinePure Plate has no stated wear-out life from CerMedia — it's ceramic, not a consumable cartridge — and any manufacturing fault is covered by your rights under Australian Consumer Law in addition to any retailer or manufacturer terms. Standard parcel freight applies.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eCan I cut the Plate to a custom size?\u003c\/h4\u003e\u003cp\u003eYes — it's rigid ceramic and can be cut with a hacksaw or angle grinder to fit a sump baffle or an odd-shaped compartment. Cutting it doesn't damage the remaining piece's biological performance.\u003c\/p\u003e\u003ch4\u003eDo I need a mesh bag for the Plate?\u003c\/h4\u003e\u003cp\u003eNo — it's rigid enough to sit directly in a sump compartment or media rack. A bag is only needed for loose media like Spheres, GEMS or PODs.\u003c\/p\u003e\u003ch4\u003eIs the Plate reef safe?\u003c\/h4\u003e\u003cp\u003eYes, the ceramic is inert and safe for reef and marine systems as well as freshwater.\u003c\/p\u003e\u003ch4\u003eDo I need to cycle a filter before adding livestock?\u003c\/h4\u003e\u003cp\u003eYes. Any new biomedia needs time for bacteria to colonise the ceramic before it's doing useful biological work. Run it on established tank water, or fishless-cycle with an ammonia source, before stocking up.\u003c\/p\u003e","brand":"MarinePure","offers":[{"title":"Default Title","offer_id":54773874131235,"sku":"100894","price":92.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/marinepure-plate-8x8x1-784931.webp?v=1790230840"},{"product_id":"marinepure-spheres","title":"MarinePure Spheres","description":"\u003cp\u003e\u003cstrong\u003eOne sphere replaces roughly 1,350 plastic bio-balls in the same space.\u003c\/strong\u003e MarinePure Spheres are 38 mm (1.5\") ultra-porous ceramic biomedia made by CerMedia in the USA. The open, interconnected pore structure gives bacteria a huge surface to colonise, so a modest volume of spheres does the biological filtration work of a much larger volume of plastic media — and the deep pores support the low-oxygen zones that also help bring nitrate down.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-porous ceramic\u003c\/strong\u003e — fired above 1,000°C, inert, and never leaches into the water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandles ammonia and nitrite\u003c\/strong\u003e — the primary biological filtration job, at high flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelps reduce nitrate\u003c\/strong\u003e — deep pores create low-oxygen zones plastic bio-balls can't replicate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree-pours into any filter\u003c\/strong\u003e — canister filters, sumps, wet\/dry towers and trickle filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreshwater and marine\u003c\/strong\u003e — the same media works in either\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNever needs replacing\u003c\/strong\u003e — inert ceramic doesn't wear out or break down biologically\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003cth\u003eApprox. media volume\u003c\/th\u003e\n\u003cth\u003eSuitability\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.9 L Box\u003c\/td\u003e\n\u003ctd\u003e100892\u003c\/td\u003e\n\u003ctd\u003e2 US quarts\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3.8 L Box\u003c\/td\u003e\n\u003ctd\u003e100893\u003c\/td\u003e\n\u003ctd\u003e1 US gallon\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18.9 L Bucket\u003c\/td\u003e\n\u003ctd\u003e102688\u003c\/td\u003e\n\u003ctd\u003e5 US gallons\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e56 L Half-Drum\u003c\/td\u003e\n\u003ctd\u003e102666\u003c\/td\u003e\n\u003ctd\u003e~15 US gallons\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 L Drum\u003c\/td\u003e\n\u003ctd\u003e100896\u003c\/td\u003e\n\u003ctd\u003e~26 US gallons\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eHow much filtration does it provide?\u003c\/h3\u003e\u003cp\u003eCerMedia rates MarinePure media at roughly 1 part media to 500 parts tank water for ongoing ammonia and nitrite control, so the tank volume a pack supports scales directly with the pack size:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eMedia volume\u003c\/th\u003e\n\u003cth\u003eApprox. tank volume supported\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.9 L Box\u003c\/td\u003e\n\u003ctd\u003e1.9 L\u003c\/td\u003e\n\u003ctd\u003e~950 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3.8 L Box\u003c\/td\u003e\n\u003ctd\u003e3.8 L\u003c\/td\u003e\n\u003ctd\u003e~1,900 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18.9 L Bucket\u003c\/td\u003e\n\u003ctd\u003e18.9 L\u003c\/td\u003e\n\u003ctd\u003e~9,450 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e56 L Half-Drum\u003c\/td\u003e\n\u003ctd\u003e56 L\u003c\/td\u003e\n\u003ctd\u003e~28,000 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 L Drum\u003c\/td\u003e\n\u003ctd\u003e100 L\u003c\/td\u003e\n\u003ctd\u003e~50,000 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThese are guide figures for a typically stocked tank, not a hard ceiling — a lightly stocked system will comfortably run on less, and a heavily stocked one benefits from sitting toward the next size up.\u003c\/p\u003e\u003ch3\u003eWhich size do I need?\u003c\/h3\u003e\u003cp\u003eMatch the pack to your system volume against the table above, then round up if your tank is heavily stocked or you're running the media as your only biological stage. Multiple smaller packs can be combined — the total media volume is what counts, not the number of boxes.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for any freshwater or marine system using a canister filter, sump, wet\/dry tower or trickle filter. Not suitable as the sole filtration in systems that also need mechanical filtration — MarinePure handles the biological stage only, and pore-clogging debris should be caught upstream by a mechanical stage first.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRinse before first use — a tap-water rinse followed by a tank-water rinse clears shipping dust from the pores\u003c\/li\u003e\n\u003cli\u003eKeep mechanical filtration upstream so debris doesn't clog the pore structure\u003c\/li\u003e\n\u003cli\u003eRinse gently in removed tank water roughly every three months, or when flow through the media noticeably slows\u003c\/li\u003e\n\u003cli\u003eNever rinse in tap water once established — chlorine and chloramine will kill the bacterial colony\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cp\u003eA MarinePure Vault keeps loose spheres contained and easy to lift out for cleaning, rather than loose in the sump. A mesh media bag sized to the pack does the same job in a canister filter basket.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eMarinePure ceramic media carries no manufacturer warranty as such — it's an inert, non-mechanical product with nothing to fail — and is covered by the consumer guarantees available under Australian Consumer Law regardless. Standard freight applies to the box and bucket sizes; the 56 L half-drum and 100 L drum are bulky items and may attract an oversize freight surcharge at checkout.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eCan I mix MarinePure Spheres with my existing bio-balls or ceramic rings?\u003c\/h4\u003e\u003cp\u003eYes. MarinePure can be added alongside existing biomedia — there's no compatibility issue — though replacing the older media over time makes better use of your filter's volume.\u003c\/p\u003e\u003ch4\u003eDo I need to cycle the tank again after adding MarinePure?\u003c\/h4\u003e\u003cp\u003eNo, provided you're adding it to an already-cycled system. The spheres will pick up bacterial colonisation from the existing water within days rather than starting from zero.\u003c\/p\u003e\u003ch4\u003eWill MarinePure lower my nitrate on its own?\u003c\/h4\u003e\u003cp\u003eIt helps. The low-oxygen zones deep inside each sphere support denitrifying bacteria, but nitrate control also depends on stocking, feeding and water changes — MarinePure is one part of the picture, not a standalone fix.\u003c\/p\u003e\u003ch4\u003eCan I use MarinePure in a sump without a container?\u003c\/h4\u003e\u003cp\u003eYes, it can be poured loose into a sump baffle chamber, but a MarinePure Vault or a mesh bag makes it far easier to remove for its occasional rinse.\u003c\/p\u003e\u003ch4\u003eIs MarinePure reef safe?\u003c\/h4\u003e\u003cp\u003eYes. It's an inert fired ceramic with nothing to leach, and is used in both freshwater and marine systems including reef tanks.\u003c\/p\u003e","brand":"MarinePure","offers":[{"title":"1.9L Box","offer_id":54773874295075,"sku":"100892","price":95.95,"currency_code":"AUD","in_stock":false},{"title":"3.8L Box","offer_id":55335328121123,"sku":"100893","price":173.95,"currency_code":"AUD","in_stock":false},{"title":"18.9L Bucket","offer_id":55335328153891,"sku":"102688","price":593.95,"currency_code":"AUD","in_stock":false},{"title":"56L Half-Drum","offer_id":55335328186659,"sku":"102666","price":1723.95,"currency_code":"AUD","in_stock":false},{"title":"100L Drum","offer_id":55335328219427,"sku":"100896","price":2800.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/marinepure-spheres-43160124457251.webp?v=1790237816"},{"product_id":"marinepure-pods","title":"MarinePure PODs","description":"\u003cp\u003e\u003cstrong\u003eOne POD replaces thousands of plastic bio-balls for the same job.\u003c\/strong\u003e MarinePure PODs are ultra-porous ceramic biomedia spheres about 8 cm (3.1\") across, made by CerMedia (USA) from the same inert aluminosilicate ceramic as MarinePure Spheres and the Plate. CerMedia states a single POD carries the equivalent surface area of over 5,000 plastic bio-balls, and sells them in a 3-pack sized for a canister filter or small sump, or a 24-pack sized for a full sump or large canister setup.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent to 5,000+ bio-balls per POD\u003c\/strong\u003e — CerMedia's own comparison figure for the surface area a single POD carries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePublished bioload ratings\u003c\/strong\u003e — CerMedia rates the 3-pack to 100 US gallons and the 24-pack to 750 US gallons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResists clogging\u003c\/strong\u003e — the rigid ceramic structure holds its shape, so flow through the media stays consistent between cleans.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable\u003c\/strong\u003e — rinse in tank water at a water change rather than replacing on a schedule.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSits loose or bagged\u003c\/strong\u003e — large enough to sit directly in a sump compartment, or contained in a MarinePure Mesh Bag for easy handling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMarinePure (CerMedia, USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePod diameter\u003c\/th\u003e\n\u003ctd\u003eApprox. 8 cm (3.1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eInert aluminosilicate ceramic, fired above 1,000°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOpen porosity\u003c\/th\u003e\n\u003ctd\u003e80–90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface area\u003c\/th\u003e\n\u003ctd\u003eEquivalent to over 5,000 plastic bio-balls, per POD (CerMedia comparison figure)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhich pack size do I need?\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eCerMedia bioload rating\u003c\/th\u003e\n\u003cth\u003eBest suited to\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3-pack\u003c\/td\u003e\n\u003ctd\u003eUp to 100 US gallons (380 L)\u003c\/td\u003e\n\u003ctd\u003eA canister filter or small sump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24-pack\u003c\/td\u003e\n\u003ctd\u003eUp to 750 US gallons (2,839 L)\u003c\/td\u003e\n\u003ctd\u003eA full sump or large display system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eBoth packs use the same POD, so there's no difference in performance per piece — only in how much total surface area you're buying. Split the difference by buying more 3-packs if 100-gallon increments suit your sump better than committing to a full 24-pack.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e sump compartments, canister filters and media racks in freshwater or marine systems, including reef tanks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e tight hang-on-back baskets built for loose pellets — MarinePure GEMS suits those spaces better than a full-size POD. Not a mechanical or chemical media — it won't polish water or remove odours on its own.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eRinse PODs in tank water or dechlorinated water at a water change — never under tap water straight from the mains, since chlorine and chloramine will knock back the bacterial colony. There's no fixed replacement interval; the ceramic doesn't wear out, so PODs keep working until they're due for a clean.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarinePure Mesh Bag (Medium)\u003c\/strong\u003e — contains a 3-pack for easy lift-out and rinsing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn ammonia and nitrite test kit\u003c\/strong\u003e — confirm the media is cycled before stocking up.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eMarinePure PODs have no stated wear-out life from CerMedia — they're ceramic, not a consumable cartridge — and any manufacturing fault is covered by your rights under Australian Consumer Law in addition to any retailer or manufacturer terms. Standard parcel freight applies; the 24-pack is heavier and may attract a higher freight quote at checkout, though it ships as standard parcel post.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eDo I need a mesh bag for PODs?\u003c\/h4\u003e\u003cp\u003eNot necessarily — PODs are large enough to sit loose in a sump compartment or media rack. A Mesh Bag makes them easier to lift out for a rinse, but isn't required for them to work.\u003c\/p\u003e\u003ch4\u003eCan I mix POD pack sizes to reach a specific bioload target?\u003c\/h4\u003e\u003cp\u003eYes — CerMedia's bioload ratings scale with the number of PODs, so combining a 3-pack and a 24-pack, or buying multiple 3-packs, is a valid way to size up gradually.\u003c\/p\u003e\u003ch4\u003eAre PODs reef safe?\u003c\/h4\u003e\u003cp\u003eYes, the ceramic is inert and safe for reef and marine systems as well as freshwater.\u003c\/p\u003e\u003ch4\u003eDo I need to cycle a filter before adding livestock?\u003c\/h4\u003e\u003cp\u003eYes. Any new biomedia needs time for bacteria to colonise the ceramic before it's doing useful biological work. Run it on established tank water, or fishless-cycle with an ammonia source, before stocking up.\u003c\/p\u003e","brand":"MarinePure","offers":[{"title":"3pk","offer_id":54773874393379,"sku":"124739","price":48.95,"currency_code":"AUD","in_stock":false},{"title":"24pk","offer_id":55335328088355,"sku":"124740","price":238.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/marinepure-pods-43160125931811.webp?v=1790237816"},{"product_id":"marinepure-vault","title":"MarinePure Vault","description":"\u003cp\u003e\u003cstrong\u003eKeeps loose biomedia contained, protected and easy to lift out for cleaning.\u003c\/strong\u003e The MarinePure Vault is a rigid, stackable container from CerMedia (USA) sized to hold a full load of MarinePure media in a sump — protecting the relatively brittle ceramic from knocks, keeping the sump tidy, and turning a media rinse into a one-hand job instead of scooping loose spheres out by hand.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid, ventilated container\u003c\/strong\u003e — holds media secure while water flows freely through it\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne-hand removal\u003c\/strong\u003e — lift the whole load out for its rinse instead of fishing for loose media\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStackable\u003c\/strong\u003e — combine multiple Vaults for larger systems or staged filtration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoubles as a skimmer riser\u003c\/strong\u003e — raises a protein skimmer to the working height a sump needs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects brittle ceramic media\u003c\/strong\u003e — shields Blocks and Spheres from knocks against sump walls and baffles\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFreshwater and marine safe\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e124722\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal dimensions\u003c\/td\u003e\n\u003ctd\u003eapprox. 20 × 20 × 10 cm (8\" × 8\" × 4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal dimensions\u003c\/td\u003e\n\u003ctd\u003eapprox. 23 × 23 × 13 cm (9\" × 9\" × 5¼\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitability\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat it holds\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMedia\u003c\/th\u003e\n\u003cth\u003eCapacity per Vault\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarinePure Block\u003c\/td\u003e\n\u003ctd\u003e1 Block (8\" × 8\" × 4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarinePure Spheres\u003c\/td\u003e\n\u003ctd\u003eapprox. 3.8 L (1 US gallon)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarinePure PODs\u003c\/td\u003e\n\u003ctd\u003e10–12 PODs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarinePure GEMS\u003c\/td\u003e\n\u003ctd\u003eover 900 GEMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eLoaded with a 3.8 L (1 US gallon) fill of Spheres, one Vault supports roughly the same 1,900 L of tank water that a loose 3.8 L pack of Spheres supports, on CerMedia's stated ratio of 1 part media to 500 parts tank water. The Vault changes nothing about the media's filtration capacity — only how it's contained.\u003c\/p\u003e\u003ch3\u003eWhich one do I need?\u003c\/h3\u003e\u003cp\u003eOne Vault suits a single 8\"×8\"×4\" footprint of media. For a larger sump, stack two or more rather than looking for a bigger single unit — CerMedia doesn't make one, and stacking keeps each layer easy to lift and rinse individually.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for any sump running MarinePure Blocks, Spheres, PODs or GEMS, in freshwater or marine systems. Not a substitute for the biomedia itself — the Vault is sold empty and holds media you already own or buy separately.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eLift the Vault out as a single unit for the media's routine rinse. The rigid frame needs no maintenance of its own.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cp\u003eMarinePure Spheres or Blocks to fill it, and a mesh media bag if you'd rather line the Vault before filling.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the consumer guarantees available under Australian Consumer Law. Standard freight applies.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eDoes the Vault come with media inside?\u003c\/h4\u003e\u003cp\u003eNo, it's sold empty. Add MarinePure Blocks, Spheres, PODs or GEMS separately.\u003c\/p\u003e\u003ch4\u003eCan I stack Vaults on top of each other?\u003c\/h4\u003e\u003cp\u003eYes, they're designed to stack, which is the usual way to scale up media volume in a larger sump.\u003c\/p\u003e\u003ch4\u003eCan the Vault double as a skimmer stand?\u003c\/h4\u003e\u003cp\u003eYes. Its rigid, flat-topped design is commonly used to raise a protein skimmer to the height a sump chamber needs.\u003c\/p\u003e\u003ch4\u003eWill water flow through the Vault properly, or does it channel around the sides?\u003c\/h4\u003e\u003cp\u003eThe Vault is ventilated to let water pass through the media it holds rather than around it — that's the point of the design over loose media sitting in a sump chamber.\u003c\/p\u003e","brand":"MarinePure","offers":[{"title":"Default Title","offer_id":54773874458915,"sku":"124722","price":147.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/marinepure-vault-866275.webp?v=1790230840"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/collections\/124722.jpg?v=1782968397","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/collections\/marinepure.oembed","provider":"Nicks AOT","version":"1.0","type":"link"}