Hello everyone. My mother in law was taking care of my two tanks while i was away for two weeks and i think she was over feeding. One tank is a 40gallon with a 20 gallon refugium that houses a 6 inch porcupine puffer and a christmas wrasse i have a skimmer and uv sterilizer and only use live rock about 80 lbs as well as chaeto and calurpa in entire system i have done water changes every day and can not get my nitrates below 80 i only feed once a day and have even taken my fuge and cleaned out all my detritis. My other tank is a little over poplulated reef and have never had an issue until now this also has a fuge. I religiously do water changes everyday and am just stumped on what else to do. Both tanks have clean up crew and havebt lost anything in almost a year. Please help!!