So, after having two kids and moving states I am finally able to get back into keeping fish! First it was just my 10 gallon planted Betta tank and now I have a 38 gallon setup with some live plants and my new little baby goldfish I just got a few days ago. I know my tank should only hold two...

Lately I noticed my beloved Pearlscale Choji has had a bump above his left pectoral fin. He's had it for a month and seems to be swimming and eating fine. He's in a twenty gallon with a 1 and half inch Oranda who is healthy. He is about 2 inches himself. Water permiters are fine too. The bump...