I recently tested my water because I noticed that a fish was acting strangely. Everything else seemed pretty normal (pH, Ammonia, Nitrite) except the Nitrate level. The Nitrate level was somewhere in the 80 - 160 ppm range, which is exceptionally high.
I am curious as to what can be done to help lower these levels without causing much more additional stress to my fish.
I am curious as to what can be done to help lower these levels without causing much more additional stress to my fish.