Hello, new to this hobby ~6 months and made my first coral purchase....3 clove polyp frags. They have this brown growth on them and it seems to be getting worse and now I’m noticing some brown spots on my rock and substrate. I did dip these in Coralrx before putting them in the tank but whatever this is seems to be getting worse. I’ve attached 2 picture of the 3 frags and I hope it’s clear enough to see. Thanks in advance for any help.