We feed DT's Phytoplankton & also Marine Snow. Both are referigerated products. I also spotfeed my Elephant Ear mushroom & the other mushrooms who are "bumpy" with meaty food such as mysys shrimp. My yellow polyps also will catch meaty food & eat it. My green star polyps never catch anything to eat, even if I spot feed.
I'm not positive if our zoos, mushrooms, & polyps are eating the DT's and Marine Snow (we have other corals that are filter feeders, so I know they eat it...)