Hi! I inherited a tank from a friend who moved, and it seemed very crowded so I have everyone in a bigger tank for a while now and I noticed 2 neons have odd belly bulges. They seem to be hanging out in a little area protected by wood and rocks but do still swim off with the others about half time. None of the other inhabitants seem to have this does this look worrisome? I tried researching what it could be and was nervous that I’m not interpreting info right and don’t want to separate them off and do more harm to them if it’s benign. This is day 2 of belly bulge that I have noticed.
several pics of the two below one is more pronounced than the other.
Thank you for any help! ?




several pics of the two below one is more pronounced than the other.
Thank you for any help! ?



