The Puffer Forum

pH around 7/8 - tap water
Ammonia, Nitrite - 0
Nitrate - 10-20ppm

100L tank with 2 SAPs and 5 otos

I did a water change yesterday, 50%, but had been away for 10 days before, so the tank didn't get changed for 2 weeks, usually it is 50% weekly.

When I came back from holiday yesterday, all was well except that one of the SAPs (the one that is always a bit thinner and smaller and stupid with food), had a lump just below his lip. I thought that it was just a cut that I may have caused from trimming their teeth before I went away, so I added melafix and pimafix after the water change.
I came back this evening to add some more and feed and it now looks well, like a pink spot with a white head basically.

I am thinking that this is maybe a cist that is going to burst, so is there anything that I can do except add melafix and pimafix and just hope for the best??

Its probably something he bumped it on.. I would do as you are doing, maybe increase water changes. I always hesitate to add medications if I don't know what I'm dealing with.

My turgidus gets bumps sometimes if the water quality gets on the 20+ nitrate side, they heal up looking like whiteheads, as you said. So maybe it was just the two weeks without a change that did it. Bubba never got them before I moved to this water supply, so I'm thinking there's something in the water he doesn't like here. If I do big water changes or use some RO water, he doesn't get them, but I have to stay on top of it.