I just got home from work today I have a 29 gallon with one firemouth, two blood parrots, and a EBJD and I noticed he was hiding a lot yesterday and today I see him at the bottom of the tank laying on the sand and I saw him doing a roll on the sand almost equivalent to how a gator does that death spin he looks extremely weak but everyone else is doing fine? Should I quarantine him and use Melafix or Fin&body treatment? I am freaking out right now and don’t know what to do.