Essentially, Eric Borneman writes to mix up a combination of fresh seafood (whole shrimp, mussels, oysters, clams), frozen aquarium foods (frozen urchins, roe, & decapsulated artemia), dried seaweed, dried flake food, and some liquid vitamin (such as Selcon). Be sure to shell the raw shrimp. Then, powder the dried stuff, add Selcon, soak dried seaweed (Nori, Dulse) in pure water, & put seafood in a blender. Liquefy the seafood, & mix all the ingredients well. Put into either mini-ice-cube trays, or in ziploc bags, and freeze. Serve about 4 tsp/300 gallon once/day.