Hello all! Sorry this is my first post, hopefully I'm in the right section. I got my first tank and betta just over a month ago. About a week or so after getting him, I noticed these red scales developing on the sides of his body (first pic). You can see the contrast to the second picture which was taken very shortly after I got him. Water temp is 74 degrees F, parameters are 7.4 ph, .25ppm ammonia, and 0 rpm for both nitrites and nitrates. He has had these red scales for a few weeks and it seems as though more are developing. Any help determining what this is and how to treat would be greatly appreciated. Thank you!