{"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","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/marinepure-gems-90g","provider":"Nicks AOT","version":"1.0","type":"link"}