Ruben, your statement, "i believe cyclopeez and phyto are not small enough" is incorrect. The polyps of coral will consume items the nematocysts fire on, and are small enough to consume. Motile types of phytoplankton meet these criteria. The non- motile phytoplankton that is not removed by the skimmer will be consumed by the bacteria and zoo plankton in the marine aquarium system, and both the bacteria and plankton are part of the micro feeding cycle.