I did shrimp last night, rince in tap water very well, the soak in some tank water, chop/dice up and add to tank, CUC loves the left overs, and skimmer goes nuts. I almost bought some clams but went with shimp instead, squid or scallops work good too, but not the scallups in the presative water, you want "dry packed ones" they cost about 3$ more a pound then the ones with the preservative in them.