so tank is about 9 months old , put some sps in there at the 6 month mark , all was well getting good growth until i noticed growth just stopped completely. at this point i had lost 1 coral and i said hrmm weird , tested everything , alk at a little over 8 and a little nitrates ( basically just detectable) . i fed a little heavier , and watched .. over the course of the next 3 weeks im losing every sps frag i have .. fish are fine , lps doesnt seem to be bothered . the sps are getting getting algae at the tips and then turning gray and just crumbling . ive never experienced this before, no turning white . i dont have a phosphate test kit but no algae growing besides stuff on the glass which is growing in about 2 days . nitrates have gone up a tiny bit but could this really be it? im thinking its some kind of metal or something, im not sure . i ordered an icp test to see what is going on. i took the mp40s apart and everything looked fine . anybody else experience this?