Hi everyone. My tap has high nitrates (80-90ish, according to API test kit.) Ammonia and Nitrite are always at zero in my aquariums, but of course the nitrates reflect what my water source is. My 75 gallon (planted) has been up and running for about 4 years, and my 125 gallon mbuna aquarium has been going for almost 3 years now. I have suffered minimal fish casualties, but it still drives me nuts. Anyone have any bright ideas on how to counter-act this? Anyone have any experience with any products that help?