First tank and fish. The one clown is doing great but my other guy seems to be struggling. Added 4 days ago. Still gets up and moves around to eat. Added the air stone last night to help his breathing and been adding garlic guard to food to help boost immune system. What do you think is going on? I cant see anything externally visible on him. Water sits at 79 to 80 degrees and all water parameters are spot on and haven’t changed since being added.