- Reaction score
I am curious if anyone has personally experienced or heard of negative repercussions on fish health from high nitrate level. It is always said that nitrate should be kept below 40 mg/L, but why is this? Can anyone link a scientific study showing that amounts exceeding 40 mg/L for an extended period of time reduce lifespan, immune system efficiency, growth rate, oxygen saturation, etc.., of freshwater fish? Any input will be appreciated.