I went to a local Asian food store and bought a mixed seafood bag for 3.50 a lb. It has squid, octopus, clams, and shrimp. My wife and I simply shoved it in a blender and blendorized it - to borrow a phrase from a MAAST member. What resulted was a paste like substance that I thought would not work. But we tried it any way... I took a small spoon full and chunked it in the tank. The paste quickly transformed into small bits of food... My fish went crazy....I have never seen them feed that furious before. It was cool...and rewarding. For the 3.50 lb we have about 30-40 days worth of food (give or take..we are still experimenting.) We still plan on feeding some store bought food from time to time, but we are very pleased with the DYI food outcome. We are also pleased that it is far less expensive and look forward to experimenting with different materials….cool stuff.