Hello. I have a 1.5 gal Tetra betta aquarium and new betta got ick. Only been in tank 24 hrs. Had 2 others previously that died--one had ick, other didn't. I sanitized tank in scorching hot water for 2 hrs. and cooled everything down before putting in new guy. His nose is pointed down into a micro sword narrow leaf plant. If I move the plant he comes out and swims, but goes right back and hides in plant. Don't have heater. Temp is 68F (room temp of my house). Just put in super ick cure. Does anyone have any recommendations? Should I buy heater? Getting lots of conflicting info and pet store doesn't know what else to suggest. My daughter is so upset her fish keep dying. Thanks!