So I found a nail bucket. It was 2.7 gallons, it was made of "food safe" plastic, and it was watertight. I added plants and a heater. After about a week, I noticed Alexander the betta was lethargic and reathing about 4 times a miunet.Sometimes, he twitched and swam in a circle. In other words, he was close to death. I rushed to walmart and bought him a new 5 gallon glass tank, set it up, added 1 gallon of dechloronated water, and put Alexadner it (after stupidly dropping him in the sink). He's not doing so well. He tried to eat one pellet, but he spat it out like it tasted horrible (he's eaten these pellets all his life). The tank is not heated ATM, but only because its not full. He has finrot (he came to me with it) and so i will be adding AQ after this post. How can I help the little guy?
EDIT: I forgot to mention that the tank isnt full so he can breathe easily.