Jesus I didn’t expect this many responses. Okay so I do feed two large feedings a day but my tank is a 55 gallons and I have two 75 topfin silenstream hob filters. I did do a water change today after the second feeding and I still didn’t see any improvements. My Parameters Are fine just a little bit less oxygen in the water. I do think I keep my lights on for too long-about 10hrs-. I have 6 common plecos, going to be 2 5inch Adonis plecos, 2 rope-fish, 1 farlowella, 1 rhino pleco, 1 clown pleco, and last but not least 1, 5-7 inch bala shark that I’m probably going to give to petsmart just to get rid of, he jumped twice today. And I hope this helped figure out what it is. Thanks hope to hear back from you