JennM;369551 wrote: There's nothing jumping out at me in the parameters. Nitrate of 5 is very respectable and unlikely to be the cause of anything bad.
Iodide - be careful with that. Some is good, but more is not better. Iodide is more stable than iodine.
Typically the things that stress fish and cause outbreaks are aggression, pH and/or temperature swings, poor water quality (which yours is not - it's fine)... overstocking, stray voltage... and other factors that would otherwise "worry" the fish - make it ill-at-ease.
Of course water quality is the basis of all fish health - even if everything else is "perfect" if the water isn't - that will cause problems.
So your water is good - can you think of anything that may have caused the fish to be anxious or stressed? That's the beginning of finding out why it's sick and how to remedy it beyond treatment.
Do you have a pic of the sick fish? That might help ID the exact pathogen...
And if you must use sand in the QT - only use a small amount (like a cup full)... don't cover the bottom - you need to be able to vacuum out the tank well. In fact, if you must use sand, I'd leave it in a plastic tray or something, not scatter it on the bottom.
That sand will NOT be returned to the main tank.
Jenn
Great! Thanks Jenn! I'm trying to get a pic, but my fish is being a retard, and not letting me. I do have to tell you, we did put our hands in the tank and move a bunch of stuff around. That probably stressed her out. How quickly can the other fish catch this? My male clownfish is showing no signs of it, but I'm worried he'll get it too.
Thanks so much!!
Radha