frogspawn detaching from skeleton

[Anemonebuff]

Your PO4 is a little high and it could be blocking the coral's ability use Ca, Strontium is also necessary for corals so that they stay attached to their skeletons.

 

[LEGENDARY_ENG]

also check your salinty with a different tester than you have been using have you calibrated your meter, low salinity will do it happened to me the same way as spoke of