I would like to know what other ways are there to lower the nitrate
levels in a fish tank other then water changes. I can never seem to
get my nitrate levels below 100ppm. I have noticed that my Black
Moore develops a white spot on his head if I do not do regular water
changes every 7 to 10 days. Can this white spot
be caused by high Nitrate level and what might this spot be.

My ammonia levels before and after water changes is 0. I am using an
ammonia substrate to help remove the ammonia.

Kurt Pasewaldt.