{"product_id":"fluval-nitrate-cartridge-g6","title":"Fluval Nitrate Cartridge G6","description":"\u003cp\u003e\u003cstrong\u003eA drop-in nitrate scrubber sized for the larger Fluval G6 filter.\u003c\/strong\u003e The Fluval Nitrate Cartridge G6 (Fluval part A422) is chemical filter media pre-loaded into a cartridge that seats directly into the G6 canister, rated to remove up to 24,000 mg of nitrate ion from freshwater aquariums — roughly double the capacity of the G3's equivalent cartridge, to match the G6's larger media volume.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurpose-built for the Fluval G6\u003c\/strong\u003e — drops straight into the G6's media stack; no repacking of loose resin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemoves up to 24,000 mg of nitrate ion\u003c\/strong\u003e — sized for the G6's larger 300–600 L tank range and aimed at keeping freshwater nitrate below the commonly recommended 20 mg\/L.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo cycle disruption\u003c\/strong\u003e — chemical media only; doesn't touch the biological or mechanical stages running alongside it in the G6.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\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\u003eFits\u003c\/td\u003e\n\u003ctd\u003eFluval G6 Advanced Filtration System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer part number\u003c\/td\u003e\n\u003ctd\u003eA422\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate removal capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 24,000 mg nitrate ion (freshwater)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedia type\u003c\/td\u003e\n\u003ctd\u003eChemical (nitrate-adsorbing resin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget parameter\u003c\/td\u003e\n\u003ctd\u003eKeep freshwater nitrate below approximately 20 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for Fluval G6 filters running on freshwater aquariums with elevated nitrate.\u003c\/li\u003e\n\u003cli\u003eNot suitable as a substitute for regular water changes — it's rated as a supplementary reducer, not a replacement for husbandry.\u003c\/li\u003e\n\u003cli\u003eNot rated by Fluval for marine\/reef nitrate control at this capacity — treat it as a freshwater-specific cartridge.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eFluval doesn't publish a fixed replacement calendar for this cartridge — capacity depends on your tank's nitrate load. Test freshwater nitrate periodically; once levels stop falling, or the cartridge has been running several months under normal freshwater bioload, replace it. If you're using it as a one-off fix for a nitrate spike rather than ongoing control, it can be removed once levels have settled back down.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eStandard parcel delivery. As a chemical filter media, it's a consumable and isn't covered by a separate warranty term beyond your rights under Australian Consumer Law.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the Fluval G3?\u003c\/h4\u003e\n\u003cp\u003eNo — the G3 uses its own smaller nitrate cartridge (Fluval A421), rated at 13,000 mg to match the G3's smaller media volume.\u003c\/p\u003e\n\u003ch4\u003eWill it affect my biological filtration?\u003c\/h4\u003e\n\u003cp\u003eNo — this is a chemical media cartridge that sits alongside the G6's biological and mechanical stages without disrupting them.\u003c\/p\u003e\n\u003ch4\u003eCan I use it in a marine tank?\u003c\/h4\u003e\n\u003cp\u003eFluval rates this cartridge specifically for freshwater nitrate removal; we don't have a published marine capacity figure for it.\u003c\/p\u003e","brand":"Fluval","offers":[{"title":"Default Title","offer_id":55293297361187,"sku":"FG02D","price":88.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/FG02d.png?v=1782879624","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/fluval-nitrate-cartridge-g6","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}