Seachem added a couple of products to its “Reef” line with Seachem Reef Phyto Plankton and Reef Zoo plankton. These bottled and concentrated food products require no refrigeration and are available in 250 or 500ml bottles. The Reef Zooplankton has all the nutritional goodness you are looking for in a 12.5 to 500 um particle sized. Reef Phytoplankton is a mix of green and brown phyto ranging in size from 1 to 20 um. Seachem is shipping to distributors now and should run $9 or so for a 250 ml and 500 ml should cost around $16.