My nitrates hit 80 ppm a few days ago. I did a water change on Sunday and that brought it down a little. Just did another water change about an hour ago. I'm gonna let the tank sit over night and check the levels in the morning. I feed that tank reef plankton, ( I have corals ) krill, carnivore cuisine, mysis shrimp, brine shrimp and seaweed sheets. All frozen foods. One cube of one of those a day soaked in vitality. It's been helping. His lateral line is healing nicely and the scaring on his face looks like its been getting better. He's had it for about 3 months now.