I have a bubble coral and its tissue is slowly receding ! My tank params are amm,trites, trates 0 , sg1.027 , temp 78 , alk 4 meq , ph 8.1 -8.2 . . I add purple up twice a week . I do not have cal, mag,phos,or iodine test kit. But last time I had my phos checked it the guy told me it was really...