I feed DT's phyto three times a week for my Crocea clam, gorgonias, and to keep my pod population high. I feed DT's oyster eggs also, twice a week, mainly for my
SPS corals. Phyto is good for soft coral, clams, and some filter feeders like feather dusters, gorgonias, etc. It also, theoretically, increases the amount of
pods, leading to more natural food sources for some corals and fish. Zooplankton is mainly for
SPS corals, and maybe some
LPS. Many plankton products sold contain particles that are simply to big for corals to capture. Many of them are snake oil
IMO. Beware of what your getting.