So this started monday may 27th at 6pm my betta was laying on the bottom of the tank. My father though he was dead and told me but upon my walking up to the tank he got up and swam away. Then tuesday may 28th at 6 am he was doing the same thing. But didnt move when walked up to tank I had to put a turkey baster into tank and almost push him till he sprang to life. Now he just lays aroind on eveything and its unlike him. He also just started refusing his food( I feed him bug bites as reccomend) not his tail fin is typically a white blue mix is now has a red tint to it. I'm worried about the red. I just did a water change was in need of one and a quick google search said that can help. Any other advice? He lives with 4 neon tetras in a 2.5 gal. Should I hive hime more space? The levels are all normal.