{"product_id":"fluval-u-clean-clear-cartridge","title":"Fluval U Clean \u0026 Clear Cartridge","description":"\u003cp\u003e\u003cstrong\u003ePolishes the water in a Fluval U filter without adding a second cartridge.\u003c\/strong\u003e The Clean \u0026amp; Clear cartridge uses a resin media that reduces phosphate and nitrate, fitted into the central cartridge position alongside the BIOMAX biological media already supplied with the filter. It's an optional upgrade for anyone whose Fluval U is running clear on the mechanical stage but still testing high on nutrients.\u003c\/p\u003e\n\n\u003ch3\u003eWill it fit my filter?\u003c\/h3\u003e\n\u003cp\u003eYes, if you run any Fluval U internal filter — U1, U2, U3 or U4. It's a universal fit across the whole U-series range, so you don't need to match it to a specific model or size.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces phosphate and nitrate\u003c\/strong\u003e — targets the two nutrients most responsible for algae flare-ups, on top of the filter's normal mechanical and biological stages.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits all four U-series sizes\u003c\/strong\u003e — one cartridge works across U1, U2, U3 and U4.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrops straight into the existing cartridge slot\u003c\/strong\u003e — no extra basket or plumbing, works alongside the BIOMAX media already in the filter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eField\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eFluval U1, U2, U3 and U4 internal filters — universal fit across the whole U-series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003ePF136\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMedia type\u003c\/th\u003e\n\u003ctd\u003eHigh-performance resin blend targeting phosphate and nitrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRemoves \/ provides\u003c\/th\u003e\n\u003ctd\u003ePhosphate and nitrate reduction; fits alongside the filter's existing foam pad and BIOMAX biological media, not a replacement for either\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater, marine and reptile\/paludarium — matches the Fluval U-series filter range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReplacement interval\u003c\/th\u003e\n\u003ctd\u003eNot published by Fluval — check phosphate\/nitrate test results every 4 to 6 weeks and replace once readings stop improving after a water change\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's included, and what you'll still need\u003c\/h3\u003e\n\u003cp\u003eThe pack contains the resin cartridge only. It's an addition to your Fluval U's existing foam pad and BIOMAX media, not a replacement for either — keep both in place when you fit this cartridge.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for freshwater, marine and reptile\/paludarium setups running a Fluval U filter. Not a substitute for regular water changes — resin media slows nutrient build-up, it doesn't remove the need for maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eFluval does not publish a fixed replacement interval for this cartridge. As a general guide, check your phosphate and nitrate test results every 4 to 6 weeks and replace the cartridge once readings stop improving after a water change.\u003c\/p\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable filter media, used until exhausted rather than covered under a mechanical warranty. Standard parcel delivery.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this replace the foam pad or BIOMAX media in my Fluval U?\u003c\/h4\u003e\n\u003cp\u003eNo. It fits alongside them in the central cartridge position — keep the foam pad and BIOMAX in place.\u003c\/p\u003e\n\u003ch4\u003eDo I need a different size for a U1 versus a U4?\u003c\/h4\u003e\n\u003cp\u003eNo. This cartridge is a universal fit across all four Fluval U sizes.\u003c\/p\u003e\n\u003ch4\u003eWill this cartridge clear cloudy water?\u003c\/h4\u003e\n\u003cp\u003eIt's built for phosphate and nitrate reduction rather than mechanical clarity. Cloudy water from suspended particles is better addressed by the filter's foam pad and, if needed, a finer polishing pad.\u003c\/p\u003e","brand":"Fluval","offers":[{"title":"Default Title","offer_id":55293310566691,"sku":"PF136","price":29.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/fluval-u-clean-clear-cartrid-43875499868451.webp?v=1790236916","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/fluval-u-clean-clear-cartridge","provider":"Nicks AOT","version":"1.0","type":"link"}