We’re kind of in a crisis, so I can’t leave the house to get proper equipment to save my little sister’s Betta. She gave it to me and it is in bad condition. It’s in really dirty water, in a bowl that I doubt is even a gallon. She got him when he was a baby, so I guess the bowl is meant for baby fish, I’m not sure. He’s adult now, but his colors are really muted and his gills are always puffed out. I have a large aquarium I can put him in, but I’m not sure how to go about helping him. I’ve done research but it’s all different with each website I go to. I’m not sure if I should leave him for now or relocate him immediately. All I have is the old fish stuff from when we used to have fish. I don’t know if the tap water is safe. I have an old bottle of water conditioner, but I also don’t know if that’s safe. I read that bettas need a heater or a consistent heat of 80F. I don’t have a tank heater, but I do have a heat Matt used for reptiles. Is that safe? I don’t really know what I’m doing and would really appreciate someone telling me what to do.