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🦠 Power your aquarium’s life with Fluval Cycle — where healthy water means happy fish!
Fluval Cycle Water Treatment is a 2-liter liquid biological enhancer that instantly inoculates aquariums with beneficial bacteria. It rapidly metabolizes toxic ammonia and nitrite, stabilizing water quality and enabling immediate fish introduction. Ideal for new setups and ongoing maintenance, it promotes a healthy, balanced aquatic environment by preventing harmful bacteria growth and supporting long-term water health.

| ASIN | B00G25IAUO |
| Best Sellers Rank | 671 in Pet Supplies ( See Top 100 in Pet Supplies ) 3 in Aquarium Water Treatments |
| Brand | Fluval |
| Brand Name | Fluval |
| Country Of Origin | Canada |
| Customer Reviews | 4.6 out of 5 stars 6,764 Reviews |
| Global Trade Identification Number | 00015561183529 |
| Item Form | Liquid |
| Item Type Name | Cycle Biological Aquarium water treatment |
| Item Weight | 1.85 Kilograms |
| Item form | Liquid |
| Item weight | 1.85 Kilograms |
| Liquid Volume | 67 Fluid Ounces |
| Liquid volume | 67 Fluid Ounces |
| Manufacturer | Rolf C Hagen UK Ltd |
| Manufacturer Part Number | A8352 |
| Model Number | A8352 |
| Target Species | Fish |
| UPC | 015561183529 |
| Unit Count | 2000.0 millilitre |
| Unit count | 2000.0 millilitre |
M**D
Maintain a healthy Aquarium
I use this product when setting up a new aquarium (as part of the nitrogen cycle to promote healthy ammonia eating bacteria growth, a 6 to 8 week process) and as part of my weekly water changes. I feel that this product works very well, as my fish are all happy and healthy and I have never experienced any bad water quality issues (ammonia spikes etc). I use this weekly to add to my 200ltr, 60ltr and 30ltr aquariums when I do a water change. I change 20% - 30% of the water volume and add an appropriate dose of this stuff, however it's not really possible to overdose so it does not really matter if you add a little bit extra. I usually do add a bit more than stated on the label. I keep it stored at room temperature and the 2ltr bottle usually lasts me about 6 weeks. There is always a seal covering the opening after the lid has been unscrewed, so you know it is brand new and has not been opened / tampered with. This is safe for my fresh water aquarium inhabitants, of which I have many varieties. Pros: - The larger 2ltr bottle is excellent value compared to the 250ml or 500ml bottles - Quick delivery / repeat orders available - Far cheaper than my local pet store Cons: - Nothing I can think of really I hope this review has been helpful to you. Happy Fish Keeping!
P**L
Good
Does exactly as it says on the tin or bottle!!! Definitely a must have for the health of your fish to get the chlorine out of tap water and help control ammonia.
J**N
Used for years.great product.
Does what it says.
C**Z
Good
Good product does the job
D**E
Price service
Always buy this make
T**V
Nice buy
Does what it says on the tin.
J**D
Easy to follow instructions for cycling your aquarium
A must for starting your aquarium cycle, especially if it’s your first aquarium set up and you don’t have any access to cycled materials. 👍
J**A
Fish
Good
M**L
Cool!
Vielen Dank! Top! Gern wieder !
D**D
Bien
Me ayudó a ciclar el acuario, fue bien, el bote es pequeñito eso sí.
J**O
El mejor complemento para tu acuario
Es el mejor complemento para tu acuario. Provee de elementos biológicos para que el agua y los peces se encuentren en perfecto estado siempre
B**E
produit Fluval
Très bon produit pour aquarium. Les produits canadiens Fluval sont vraiment à recommander pour que votre aquarium, comme le mien, soit sain pour vos poissons ! je recommande !
G**T
Works well for fish and water balance
Great product for tanks.
Trustpilot
2 days ago
1 month ago