tried searching for answers on my own and tried just about everything I could think of. It’s been very slow. Alk is at 7.2 but it’s always been there. Nitrates are high but have always been. I lowered feeding and kept up with water changes. I buy my water from the local reef store here. No ammonia or nitrites. Phosphates were high and the coral was growing. By high I mean 1.2. Have been running hc gfo for about two months now. I got this tank about 4 or so months ago. I had a zoa frag that was covered by bubble algae. Saved it. Looks great now. Bubble algae was covering everything. Been dosing vibrant with great results. Now it’s killing the hair algae that covered everything. Comes off in chunks. Almost completely rid of that. But my montipora digitatas polyps don’t all come out. Had a minor amount of bleaching at the bottom but that stopped. Then the chalice started to bleach at the edges it worked it’s way throughout and is almost a completely dead frag. Everything else seems to be ok. Candy cane, rainbow ricordea mushroom are fine. Birdsnest died all the way but the guy I got it from told me it would probably happen so it was free. (Was laying on the sand bed for a long time. Broke off and was already sort of dying) dk what could make the chalice die though..