Fluval Cycle Biological Enhancer for Aquariums, 250 ml (8.4 oz)

Price: $13.99
(as of Apr 06, 2026 21:39:54 UTC – Details)

Fluval Cycle Biological Enhancer goes to work fast, releasing massive amounts of beneficial bacteria that eliminate toxic ammonia and nitrite to establish a biologically-balanced aquarium.
Is discontinued by manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 5.84 x 5.84 x 15.24 cm; 239.55 g
Date First Available ‏ : ‎ Jan. 6 2014
Manufacturer ‏ : ‎ Rolf C. Hagen Inc.
Place of Business ‏ : ‎ MANSFIELD, MA, 02048 US
ASIN ‏ : ‎ B00FPIZ8Y0
Item model number ‏ : ‎ A8349
Country of origin ‏ : ‎ Canada
Department
‏ : ‎ Unisex-Adult
Best Sellers Rank: #1,676 in Pet Supplies (See Top 100 in Pet Supplies) #9 in Aquarium Water Quality Testing & Treatment
Customer Reviews: 4.6 4.6 out of 5 stars (2,698) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });

Powerful team of beneficial bacteria immediately inoculates aquarium water
Creates a safe biological habitat for your fish
Eliminates ammonia and nitrite
Equally useful during water changes and filter media changes, when good bacteria is depleted
For Fresh and Saltwater Use. Size: 250 ml (8.4 oz) bottle treats aquariums up to 500 US Gal / 1892 L