Food for ALL Filter Feeders in Marine Aquariums Filter feeding invertebrates remove small particles from the water column. In a well filtered aquarium there is often not enough of these particles present to keep these animals going. Invertebrate Food contains a variety of food types and vitamins including both zooplankton and phytoplanton in a range of particle sizes suited to most filter feeders. Feed every other day to provide your filter feeders enough food for them to thrive and grow. Dosage: Follow the dosage instructions on the bottle label.