Sick Borbonius Anthias


The fish has been acting normally until this evening. It didn't eat when I fed the rest of the tank and just sat at the bottom next to a rock. I moved it to the refugium down below when my yellow tang started harassing it. The anthias did nothing to defend itself.

My plan is to do a big water change tomorrow when I can get my hands on some salt. Does anyone have any other advice beyond that?

The nitrates are a high right now (30ppm) SG (1.024) Temp (80 F).

I have had the fish without incident for about 8 months and all the other fish in the tank are acting normally. Any other information that would be helpful?