- Nitrites is toxic to fish aswel and must be converted to nitrate by bacteria.
This ammonia is very toxic to fish and must be converted to nitrite by bacteria.
Because high levels of ammonia and nitrite are lethal for fish, it is critical that these products be efficiently removed or converted to nitrate. Nitrate, nitrite and ammonia can also be removed through weekly water changes
Ours is between 6.4 and 6.8 which is a bit acidic but still tolerable for both the fish and plant.