I have a female betta who I thought had ich, but by now I'm wondering if it might be something else. She had it when I bought her, just a white spot on her tail. I've been treating her with an over the counter ich med for the entire month that I've had her. The spot hasn't gotten any smaller or any bigger. I'm wondering if maybe it's just a weird coloration or a different sickness? She's being housed in a bare half gallon hospital tank right now because it's easier to do frequent 100% changes on than the 2.5 gal that she'll be housed in when she's better. The temperature is 70 F.