The Puffer Forum

HELP: I have a GSP that has what looks like ringworm. I don't see any worms (anchor worms or such) coming off of him but that's the best way to describe it. He is swimming around fine and his color is good. But he is not eating. I have tried the freeze dried shrimp that I normally feed them and two days ago put in live shrimp, no interest in either! My water parameters are all good. I have him in a 36gal tank with three Fig8's. I have had them all about 6 months and the other fish seem to be fine. Couple days ago I did notice that one Fig8 was picking on the GSP and another one of the Fig8 so I isolated the bully (in the same tank) but in a breeding net/tank that I had. It helped the GSP calm down a great deal! But now I need to figure out how to medicate the GSP and his tankmates to make sure they aren't infected as well. One place told me to use metronidazole and keep the bully in the breeding tank which is in the same main tank. Another person told me it could be anchor worms and to dose with Microbe-Lift Lice & Anchor Worm medication for 2-days and remove the white filter while doing so. And another person told me to first use Melafix for 7-days and then Pimafix for 7-days and see how it goes. What do I do, I don't know who's advise to use?? Then I also saw googling something about using Praziquantel? What I have on-hand right now is the Melafix, Pimafix and Lice/Anchor Worm meds. Does anyone have a suggestion on if I can use any of these or should I try something else? I know some meds may harm the shrimp still in the tank, but I am more worried about saving my puffers than the shrimp.

Photo attached.

Almost looks like a bruise or heater burn?