DT's Phyto, Cyclopeeze, M.Y.S.I.S shrimp: this stuff I found locally in a big frozen bag, nice big pieces for the fish, smaller ones for the corals....and I know most defrost and drain the other stuff but I think it add nutrients to the water for the SPS.
Because I feed every other day, I am able to feed slightly more in a sitting.....because of this it increases the chance of the SPS catching something especially the cyclopeeze.....yesterday I was suprised when each SPS had caught more than I wanted to count.
If you don't use some kind of phyto, I noticed when not using it that my coloration fades and growth slows a little.
I have used the Oyster eggs, but did not see any difference for the cost and amount you get.