Brightwell Aquatics 500-1K Micron Zooplanktos-M Zooplankton Aquarium Supplement, 500 mL Safe and effective to increase Zooplantos in reef aquariums Fully digestible, Provides zooplankton and formulated to provide over four-thousand per ml Excellent for soft corals, clams, tunicates, larval crustaceans, and adult planktivorous