Short Dated Stock - November 2017, reduced price MarineSnow Invert Food is a plankton like food for filter feeding marine invertebrates. This first of its kind product reproduces the special biogenic suspended matter found in natural seawater. These aggregates, collectively called \'marine snow\' by ocean researchers, are known to be an important element in the food chain of marine ecosystems. They have been a missing element in closed system aquaria until now. Marine Snow is a food for tropical and cold water marine animals that feed on particulate and dissolved organic matter, phytoplankton and zooplankton. Marine Snow is based on the components of ocean plankton, does not contain yeast or egg solids, and is blended to provide food packages of the right size range for filter feeders. The formula includes suspended microscopic particles ranging in size from 0.2 microns up to 150 microns, and if forms macroscopic snow like aggregates when it mixes with sea water