u could always go to lfs and buy about 10lbs live rock cure from their tanks and that mite help him convert over to frozen brine. mine loves the frozen kind. he does love live food though, so if i dont get new corals(he likes to check out new rocks) sucks cause it takes the new coral a couple hours to open, since he wont leave it alone!! i pick up rocks from the sand to give him some copopods to chase.