i agree, the start of HITH. can't stress enough the need for water changes. I've got one in a 110 with 3 4" parrots, 1 5" syno, and 1 9" pleco and at 50% water changes a week with canister filter filter pad changes it's still could use vacuuming during the week. Might remove the parrots. DIRTY fish. good luck...remember prevention is better than the cure.