{"product_id":"fluval-biological-enhancer","title":"Fluval Biological Enhancer","description":"\u003cp\u003e\u003cstrong\u003eA shot of live bacteria that gets biological filtration started immediately, instead of waiting weeks for it to build on its own.\u003c\/strong\u003e Fluval Biological Enhancer (sold as Cycle in some regions) seeds the water with beneficial bacteria the moment it's added, giving new tanks, water changes and filter media swaps a head start on breaking down fish waste. It's available in 30 mL, 120 mL, 250 mL and 2 L sizes.\u003c\/p\u003e\n\u003ch3\u003eWhy you need one\u003c\/h3\u003e\n\u003cp\u003eNew aquariums and new filters start with no established bacterial colony, so ammonia and nitrite can build up before biological filtration catches up — the classic new-tank spike. Dosing bacteria directly shortens that gap, and topping up after every water change or filter media rinse replaces bacteria lost in the process.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLive bacteria on contact\u003c\/strong\u003e — starts working as soon as it hits the water, rather than needing time to multiply from a small starter culture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse at setup, water changes and filter cleans\u003c\/strong\u003e — Fluval recommends dosing at each of these points, not just once.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan't be overdosed\u003c\/strong\u003e — Fluval states there's no risk in dosing more than the minimum, useful if you're not measuring precisely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 L pump bottle\u003c\/strong\u003e — 5 mL per pump, for fish rooms or larger systems dosing frequently.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSizes\u003c\/th\u003e\n\u003ctd\u003e30 mL, 120 mL, 250 mL, 2 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFormat\u003c\/th\u003e\n\u003ctd\u003eLiquid bacterial culture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003ctd\u003eNew tank cycling, water changes, filter media changes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU (30 mL)\u003c\/th\u003e\n\u003ctd\u003eFLS08\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU (120 mL)\u003c\/th\u003e\n\u003ctd\u003eFLS09\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU (250 mL)\u003c\/th\u003e\n\u003ctd\u003eFLS10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU (2 L)\u003c\/th\u003e\n\u003ctd\u003eFLS12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDosage and directions\u003c\/h3\u003e\n\u003cp\u003eDose weekly for ongoing conditions, and at every water change and filter media change — Fluval's guidance is to dose for at least the volume of water changed, with no stated upper limit since the product can't be overdosed. Fluval doesn't publish a fixed millilitre-per-litre ratio, so there's no cost-per-litre figure to calculate for this product. The 2 L bottle's pump dispenses 5 mL per press.\u003c\/p\u003e\n\u003cp\u003eFluval doesn't publish the specific bacterial strains or a detailed ingredient breakdown for this product.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for freshwater and saltwater aquariums, at setup and as ongoing maintenance. Not a substitute for an established filter running mature media — it supports the process, but a tank still needs time with stable biological filtration behind it before a full stocking level is safe.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cp\u003eFluval Biological Aquarium Cleaner — the two are commonly dosed together, with the Enhancer helping manage any ammonia rise as the Cleaner speeds up waste breakdown.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Fluval's standard consumer guarantee against manufacturing defects, in addition to your rights under Australian Consumer Law. Standard freight class.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eIs this the same as Fluval Cycle?\u003c\/h4\u003e\n\u003cp\u003eYes — Fluval markets this product as Cycle Biological Enhancer in some regions. It's the same formulation.\u003c\/p\u003e\n\u003ch4\u003eDo I still need to cycle a new tank if I use this?\u003c\/h4\u003e\n\u003cp\u003eIt shortens the process, but Fluval's own guidance still points to testing ammonia and nitrite before adding a full stocking level, rather than assuming the tank is instantly cycled.\u003c\/p\u003e\n\u003ch4\u003eCan I dose it straight into the filter instead of the tank?\u003c\/h4\u003e\n\u003cp\u003eFluval's directions describe dosing into the aquarium water. If you want it to reach filter media directly, add it after a media rinse when the filter is next opened.\u003c\/p\u003e","brand":"Fluval","offers":[{"title":"30ml","offer_id":55334979109155,"sku":"FLS08","price":10.95,"currency_code":"AUD","in_stock":false},{"title":"120ml","offer_id":55293300244771,"sku":"FLS09","price":15.95,"currency_code":"AUD","in_stock":false},{"title":"250ml","offer_id":55334979141923,"sku":"FLS10","price":24.95,"currency_code":"AUD","in_stock":false},{"title":"2ltr","offer_id":55334979174691,"sku":"FLS12","price":142.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/fluval-biological-enhancer-43313830232355.webp?v=1790238520","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/fluval-biological-enhancer","provider":"Nicks AOT","version":"1.0","type":"link"}