On month three of using bio pellets, most of my zoas started melting away aswell. and like allways, its the high end ones go first. I was also battleing a thick clear slime that grew on every surface in the tank. I finally got tierd of the ill effects of he pellets and took them off line. I did 50% water changes every other day for a week for a total of 4 changes and things started going back to normal
Erik