- Jan 6, 2003
My nitrite levels are close to zero but I want to keep it at zero. It rised as a result of a mussel that got dropped in the tank and it obviously caused it to rise. I did a 30% water change a few days ago, but it didn't seem to help much. Would a 90% or 100% water change lower it completely or would it be embedded within the tank such as sand and gravel in the tank?