I have a King Betta and he has hole. A few weeks ago I noticed little round white spots on the glass and found out that it was planeria(little white worms). I took everything out of the tank took it outside, bleached, scrubbed, dried it out. I have quite a few plants as well and I went through them looking for the hard little sacs they're in and removed what I found. I put all fresh water in, added the required bacteria and water conditioner. Then put the plants back in and then put just the fish back in. None of the old water to be on the safe side. But now Bruce has the hole and swelling on that side of his head only. He is now in quarantine to be on the safe side. Any ideas on what could have caused this? I'll be getting the wormer this weekend to treat the tank.