mantis shrimp

Hey guys! So, I recently had a disaster in my hobby. My apartment had to be treated for pests, and I was required to remove all of my tanks from the apartment during treatment. During this time, I ended up losing about half of my livestock - including my beloved Peacock Mantis Shrimp. I do...

I heard theres calcium if you feed them frozen foods. ( im thinking clams, mysis shrimp, and frozen krill, tell if theres more frozen foods ). I just cant manage to feed live foods. Will it harm it in anyway by feeding frozen only.