2 separate tanks. 1 is a brichardi cichlid. And the other is a green Cory cat. I went away for 4 days and came back to this. Water in both tanks is within all limits and always is. Any suggestions or do you need any other info. Haven't had any major problems other than diatoms in both tanks and possibly a fungus spot or bacteria infection in another fish that got cleared up with API fungus med a while ago. I forget the exact name of the meds but I have them in the basement if it helps.