Originally Posted by 4alwaysAbettaluver
What was wrong with him the first time you bought him?
Low ph(6.2) from using half filtered water made him very lethargic and gasping for air. He looked like he was really going to die one night so I placed him in his cup he came in floating in the tank to give him some help for air, when I woke up he looked much better even though it was the same water in the cup. I put him back in his tank and he was back to staying on the bottom and gasping for air. When I brought him back they put him in water out of another fish tank. Since I have him back he's been in nothing but aged, warmed and conditioned tap water and he swims(and flares) all over his tank and hangs out and sleeps in his Betta log.
So my guess is the low ph made him so lethargic he struggled to come up for air which made him constantly gasp.