Is Maracyn I and Maracyn II safe for catfish?
 

Hi all, I just joined and could use some help. I've been wanting to join a fish forum for a while now and thought this was a good time. I'm pretty new to fish keeping so I'm still learning. I have a convict cichlid I need to treat, and I was going to use Maracyn I and Maracyn II in the tank. I have 2 synodontis catfish and a bristlenose in the tank. Someone told me that medications will kill catfish since they don't have scales- is this true? Will Maracyn have bad effects on my catfish or pleco? I don't have anywhere to move my convict to, and though I really need to treat her I need to make sure it's ok for my catfish first.

:wave: Welcome to the forum.

It is true that certain meds. can't be tolerated by "Scaleless" fish, as they can burn their skin. MI & M2 is safe to use and shouldn't harm them. The meds. to stay away from are the ones that contain copper in the ingredients.

Concur, I have used both those meds at the same time, no problem. I have used copper-based meds also in my tank housing pepper and aneus corys, but would certainly say avoid copper if you can. It did alter their activity levels.