Black algae question and pick of Copperbanded Butterflyfish

[TRMCC79]

Chemi-Clean will make it go away temporarily at least. Be sure to run an air stone in the tank while using it and do the recommended water change. The cyano can kill corals if left untreated. Best to eliminate it if you can.

BTW, my CBB eats PE Mysis and frozen green mussels on the half shell. I give him a treat of live black mussels from HEB every once in a while.

Thanks for the tip, I am going to try the mussels on Monday!

The "coppery" description sounds like a diatom outbreak...
How long has the tank been set up?

Phosphates been checked?

Set up 5 months ago. I let it fully cycle then started stocking slowly about 3 months ago. Haven't checked them yet, had to leave town, but I am going to check them first thing Monday morning.

Oh, and Welcome to MAAST, TRMCC79

Thanks. I have been lurking around for about a year, but haven't had much to post about until now.