Help with sps!

[Emeraude1484]

I was debating using chemiclean but I just got a Mandy and I heard that it will essentially wipe out my copepod population so that will really be a last resort. A few months ago chaeto was running rampant in my DT which I'm thinking might have to do with my issues now since I ripped it all out. I don't seem to have much extra nutrients though. I feed once a day either pellets or half cube of mysis.