{"product_id":"aqua-medic-antiphos-fe","title":"Aqua Medic Antiphos Fe","description":"\u003cp\u003e\u003cstrong\u003eIron-based GFO that strips phosphate before algae gets to use it.\u003c\/strong\u003e Aqua Medic Antiphos Fe is an iron hydroxide filter media that binds phosphate and silicate from aquarium water, starving the nuisance algae that feed on them. It is aluminium-free and safe for fish, invertebrates and plants when run correctly in a reactor or filter bag.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinds phosphate and silicate\u003c\/strong\u003e — removes the two nutrients that drive nuisance and diatom algae growth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminium-free iron hydroxide\u003c\/strong\u003e — will not leach aluminium into the water column the way some older GFO media can.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh or marine\u003c\/strong\u003e — suitable for both, including reef systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-lasting capacity\u003c\/strong\u003e — roughly 10 g of phosphate bound per kilogram of media before it is exhausted.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo pack sizes\u003c\/strong\u003e — 500 g and 1000 g, to match reactor size and system load.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eVariant\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003cth\u003eBarcode\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 g\u003c\/td\u003e\n\u003ctd\u003eAA2595\u003c\/td\u003e\n\u003ctd\u003e14025901143423\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1000 g\u003c\/td\u003e\n\u003ctd\u003eAA2771\u003c\/td\u003e\n\u003ctd\u003e4025901143430\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eHow much tank does a pack cover?\u003c\/h3\u003e\u003cp\u003eAqua Medic rates the 500 g pack as sufficient for a 300 L aquarium under normal bioload for approximately three to six months, depending on stocking and feeding. The 1000 g pack carries twice the media by weight; treat that as a larger-system or longer-interval option rather than assuming an exact doubled figure, since binding capacity is also affected by flow rate and how saturated the phosphate load already is.\u003c\/p\u003e\u003ch3\u003eSetting it up\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRinse the media before use to clear dust that would otherwise cloud the tank.\u003c\/li\u003e\n\u003cli\u003eRun it in a fluidised media reactor or a mesh filter bag, in good flow — GFO works by contact, so a reactor that keeps the media gently tumbling outperforms a bag sitting still in a sump corner.\u003c\/li\u003e\n\u003cli\u003eReplace before it is fully exhausted rather than waiting for phosphate to rebound — test your phosphate level and swap the media once the reading plateaus rather than climbs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for freshwater and marine systems, including reef tanks, where phosphate or silicate is driving algae. Not a fix for an overstocked or overfed tank on its own — it treats the symptom; feeding and stocking are the underlying lever.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eTest phosphate regularly rather than running to a fixed calendar date — bioload varies run to run. Sudden, heavy dosing of fresh GFO into an already low-phosphate reef tank can drop phosphate too fast for corals used to a higher baseline; introduce a fresh batch gradually if your tank already reads low.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the manufacturer's standard shelf-life guarantee, in addition to your rights under Australian Consumer Law. Ships standard parcel from North Lakes, QLD.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWill this affect my corals?\u003c\/h4\u003e\u003cp\u003eUsed as directed it is safe for reef systems, but drop phosphate gradually if your tank already reads low — corals adapted to a slightly higher baseline can react to a sudden swing.\u003c\/p\u003e\u003ch4\u003eReactor or filter bag — which is better?\u003c\/h4\u003e\u003cp\u003eA reactor that keeps the media tumbling gets more even contact and typically better performance per gram; a filter bag is a reasonable lower-cost option for smaller systems.\u003c\/p\u003e\u003ch4\u003eHow do I know when to replace it?\u003c\/h4\u003e\u003cp\u003eTest phosphate on a regular schedule. Once the reading stops falling and plateaus, the media is exhausted even if it still looks physically intact.\u003c\/p\u003e\u003ch4\u003eDoes it work in freshwater?\u003c\/h4\u003e\u003cp\u003eYes — it is not reef-specific. Freshwater planted and community tanks fighting phosphate-driven algae can run it the same way.\u003c\/p\u003e","brand":"Aqua Medic","offers":[{"title":"500g","offer_id":55242265985315,"sku":"AA2595","price":34.95,"currency_code":"AUD","in_stock":false},{"title":"1000g","offer_id":55335403028771,"sku":"AA2771","price":67.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/aqua-medic-antiphos-fe-43106863087907.webp?v=1790237816","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/aqua-medic-antiphos-fe","provider":"Nicks AOT","version":"1.0","type":"link"}