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I tend to use Two Little Fishes Marine Snow, Amazon.com : Two Little Fishies ATLMSPD4 Marine Snow, 16.9-Ounce : Aquariums : Pet Supplies
I'll use a bit of RODI, melt food of choice in it, rinse it, then add a small amount of the snow maybe 2x per week.
I was using Coral Frenzy in the past as well as Reef Roids, but this seems to work better for me. I did pick it out for the contents which include organics, phyto and zooplanktons.