My clownfish has been showing symptoms for about 10 days now. Initially, I suspected it might be ich, as I know it can sometimes be present without visible signs. This clownfish has always been the only livestock in the tank, which also houses a mangrove and some macroalgae. I’ve had him for 6–9 weeks, and he didn’t show any signs of illness until now.
The symptoms started with small white dots on his tail, which made me suspect ich. However, I’m unable to treat with copper since it’s difficult to obtain here in Europe, and the same goes for formalin. My plan has been to treat with hyposalinity in my display tank, even though it would mean sacrificing the macroalgae (the mangrove should be fine). I began the hypo treatment today, but the more I observe, the more I wonder if it could actually be brooklynella (brook) instead.
He’s still eating very well, but I’ve noticed he occasionally breathes heavily. Any advice would be appreciated! The first photos are from day one of symptoms, and the other three are from about 20 minutes ago.

The symptoms started with small white dots on his tail, which made me suspect ich. However, I’m unable to treat with copper since it’s difficult to obtain here in Europe, and the same goes for formalin. My plan has been to treat with hyposalinity in my display tank, even though it would mean sacrificing the macroalgae (the mangrove should be fine). I began the hypo treatment today, but the more I observe, the more I wonder if it could actually be brooklynella (brook) instead.
He’s still eating very well, but I’ve noticed he occasionally breathes heavily. Any advice would be appreciated! The first photos are from day one of symptoms, and the other three are from about 20 minutes ago.

