Fritz Aquatics Zyme 7 | Size: 946ml (32oz) | Freshwater Nitrifying Bacteria for Aquarium | Indian Fish Monsters (IFM)

This stuff always works for me, especially if I have light stock in my tank. I do fish in cycles all the time and never had any issues with fish dying on me thanks to this product. You could prevent ammonia, nitrite, and nitrate spikes by adding like 4-5 small fish to your aquarium. Don’t add too many fish! More fish means more waste, which your new system won’t be able to handle. Add easy aquarium plants (Hornwort, Salvania minima, Brazilian Pennywort) as many as you can. You need plants plus this product for a successful fish in cycle!

I emailed Fritz about some quries and their response was prompt and friendly. been using these for tanks and i do not need to add any salts or whatever. Fzz7 will stink like old eggs and a bit brownish but it is normal, not spoiled. Fritzguard is bluish and dun need it as much as Fzz7. Keep them normally in cabinet and use them every water change. Instructions are clear..

I tried quite a no of other bacteria for my fish tank and found this to be the most effective. Only a small amount is needed for a stabilised tank.

Al parecer este producto es muy bueno y cumple con lo que se describe en la página y en las revisiones que se hacen de él, sin embargo lastimosamente llegó a mi casa con la fecha de caducidad expirada hace un año. Si se vuelve a plublicar, seguro lo compro.

This was effective for me. I did a fish-in cycle, used some lightly seeded media and gravel from another tank and then used this bacteria and dosed with Prime everyday for a few weeks. The cycle was finished pretty quick, taking about three weeks rather than the normal six or so, and I didn’t loose any fish and they all looked healthy and happy throughout. I tested my parameters regularly and had only mild spikes in levels before it colonized. I was always skeptical of bottled bacteria but this one seems to work quite well.