I've had my fish for about 9 monthes now, and last night I noticed a white patch on his back and his fins seemed tore up a little, but he was still swimming around fine. Couldn't do much about it at the time but today the white patch covers most of his body except for his head, and I don't think he can use his back tail, he just kinda flops as he swims, and struggles. I have a feeling he won't survive the night.
But... It's a 1.5 gallon tank, with a filter, water was cleaned last week, and it did fine. The room has been the same temp. for awhile, therefor the water temp hasn't changed. The Ph is normal. His enviroment has not changed much in the past few months.
Yeah I know this isn't the best picture, but he's still stubborn as all hell. His name is Bones, he's a Crown Tail Betta.