I have an endler who started changing colors, 2 orange spots on one side of his body. He is about 6 months old and 1st time I've kept them, so figured it was maturing. This began 3 weeks ago. Spots grew in diameter and I couldn't tell if they were swelling, but husband didn't think they were. Now they have gotten bumpy and swollen. He has continued eating and swimming normally. I moved him to a tank by himself (planted with tons of snails & red cherry shrimp) as another endler was nipping at one of the spots. The spots do not look to be open sores. Anyone experience this before? He just won't stay still for picks.
Nitrites- 10 Nitrates-0 Chlorine-0 Water tests Very Hard kh-40-60 ph-7.3
Any help is appreciated!