What the heck is happening with my fish??

[Salty Lemon]

It started with my yellow tang. He was sick off and on for four weeks before he died. I posted a photo and someone suggested HLLE. My lfs said the same thing. We tested the voltage (.03) and I haven't been running carbon. Water tested great and he was eating. I pulled him out and put him in QT. He died a few days ago.

Just before he died, my Anthias started acting goofy. One started with what I thought was Popeye and then he lost most of his coloration. He starting hanging out in the rocks all day long. I've had the Anthias for months. Now they are all super pale and they lay on the rocks all day long. They are still alive.

Last night, I noticed both of my clown fish who I have had from day one and over seven months, had "chunks" taken out of their white stripes. It looks like they are missing sections of their scales. They are eating fine and act as they always do.

I'm worried that this isn't HLLE and something else. I replaced the heater which was triggering the stray voltage -- as small as it was. And I'm not using carbon. What else would trigger sick fish after all these months? With different symptoms? I'm at a loss. My tank is clean, I use RO water, and I do a water change every Friday. I'm doing my best. I don't even know what to treat the fish with because I don't know how or why they are sick. Ideas?

 

[HotRocks]

Can you add some additional pics of the anthias?

I suspect something bacterial. Possibly flukes as well. Velvet is another possibility.

 

[Mical]

What are current parameters of tank? Salinity, Alk, Cal and Mag...

 

[Brew12]

Can you add some additional pics of the anthias?

I suspect something bacterial. Possibly flukes as well. Velvet is another possibility.

+1
Agreed that it is bacterial. The question is "what else". A healthy fish can fend off most bacteria. When something else happens to weaken the fish, such as flukes or velvet, then the bacteria can become a large problem.

 

[norfolkgarden]

You never mentioned parameter numbers. Mine were "not the best" for several years.
Did very little testing, mostly occasionally at the LFS.

Parameters that are too far near the edge can make or break the difference when your fish have bacterial infections.

You should be able to get all of it tested for free or a dollar or 2 at the LFS if you don't have your own testing kits yet. [emoji846]