Fluval Cycle Biological Enhancer, 250 ml ( Packaging may vary)

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!

Seemed to work well tank cycled quicker

Does what it says.

Good product does the job

Does what it says on the tin 👌

I got a new aquarium so new substrate, new filter, (new everything, basically). I filled the tank and let it run for a few days then added the first dose of the recommended three day initial course of Fluval Cycle. On day two a test strip showed all levels of potential concern (ph, chlorine, carbonate, total hardness, nitrite and nitrate) were within acceptable parameters. Accordingly it looks like I could have introduced fish before I had even introduced the second measure. Instead I waited until after the third dose, introduced some neon tetras and two catfish and they are as happy as any fish I have seen in established tanks. I'm confident further measures of Fluval Cycle weekly, at water changes and when introducing new fish can only be beneficial.

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.

Update - the company replaced my product hassle free and where very courteous. This one has a great expiry date. Was a good price for the item but unfortunately it expires in May 2023 so not so good value as I won’t be using it all in a month. I have raised this issue with the seller so I’ll see what happens when they get to me

Vielen Dank! Top! Gern wieder !

Fluval Cycle Biological Enhancer works exactly as described. It helped establish beneficial bacteria quickly and made cycling my aquarium much smoother. My fish showed less stress, and water parameters stabilized faster than usual. A must-have for new tank setups and water changes.”

Es el mejor complemento para tu acuario. Provee de elementos biológicos para que el agua y los peces se encuentren en perfecto estado siempre

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 !

Producto muy efectivo y recomendable