I will read more after I post, but I'm afraid he won't make it much longer so am looking for quick answers on how to help him.
I have had him for 3 days. He is in a 3 gallon tank with a filter and a heater. Tank was not cycled but I added a small amount of Tetra Start Smart when I put him in. Using Top Fin water conditioner and testing water every day.
Ammonia was between 0 and .25 this morning, so I did a 50% water change. Tested an hour later and it seemed ok
Temp in tank is 76
He has been really laid back and hanging out at the bottom since I brought him home, but would move around if I tapped the cage. Went to get a different heater to get the temp in the tank up, but when I came home he was laying on his side in the bottom of the tank. He swims sideways and gets frantic if I try to get him to move. I put a little of the tank water in the cup he came in and put him in there so he doesn't have to swim far to get air. He doesn't seem to be inclined to do that though.
What can I do? I have another betta that I have had for a few months and never had any issues. I don't know what to do. Thanks in advance for any advice.