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

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.

Absolutely rubbish, please don’t buy this…buy gloop instead for the live bacteria…these don’t work.

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.

Can't report any favourable change to the cycling of my 120 litre greenhouse aquaponics set-up. May have been due to shipping. Are the bottles exposed to extremes of heat during transport that could destroy the bug population in the soup?