FluvalCycle 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 storeCons:- Nothing I can think of reallyI hope this review has been helpful to you.Happy Fish Keeping!

Use all the time quicker delivery than stated always use aquadaba company

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.

Handy back up to have in case you have a mishap they could disturb your cycle but quite expensive for what it is.

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. 👍

Good for the fish water as biological enhancer.

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 what it says on the bottle