Zooplanktos M Zooplankton will provide your filter feeders with delicious zooplankton and eggs, from 500-1000 micrometers, with this powerful supplement. Zooplanktos M is a highly concentrated formula which is ideal for stony corals, sponges, clams, tunicates, tube worms, larval crustaceans and juvenile fishes. Zooplanktos M is loaded with amino acids, including omega-3 HUFAs, vitamins, minerals, and caretenoid pigments for bringing out color. A proprietary amino acid is also added to further enhance color. This product does not require refrigeration.