why are the acan heads detaching from the skeleton??? :sad2: my water params are fine. ph 8.2, calc 450, mag 1400, nh3 0, no2 0, no3 10, po4 .02, temp 76/77. only thing different was harvesting macro (about a gallon ziploc bagful.) i have other acans with no problems whatsoever. any help is greatly appreciated.