The Puffer Forum

Hello all. Wondering if a white line on the edge of an irrubescos tail is normal/harmless? He's been in my tank for almost 3 weeks, he had the line when I first got him, and it has neither shrank or grown, or changed in any way. Is this okay?

Puffers are quite adept at camouflage & change patterns to match their environment. Looks similar to your rock in the background.

Follow up, I found this on one of my kuhli loaches but the internet has not been helpful at diagnosing. Would it be okay to dose melafix and/or pimafix to the whole tank, as it is impossible to catch those loaches.

I really don't see anything serious here but you can go ahead & use Melafix.