I feed regularly and Montis show good growth, Valida has good color with slow growth, Large LPS
look great. Cyphastrea right next to it is spreading well, so It's really just this one. I don't get it. I don't think it could have been stung either. Only thing that could is Candy Cane, but it's about 8-10" away and I've never seen feeders out of it bigger than 2".
I will be looking into a dosing setup, thanks for the input!