Rods! Great food that has everything in it. I fed exclusively with it. saw great results with ti.
The other way to go and will last you longer is make your own. Its expensive from the start but i have heard people making dozens of cookie sheets of it and then storing or selling it. They spent anywhere from $50-$80 to get all the ingredients: fish, oysters, clams, muscles, shrimp, kryll, oyster eggs, vitamins, phytoplankton, etc. It usually last them from what i understand anywhere from 6-12 months depending on how often they fed and bioload of the system. Rods usually lasted me 1 month at $20 bucks per=$240 to feed the system for a year not counting the shrimp and scallops to feed the nems. When you compare the costs saving to making it yourself, it is substantial. I will find the thread and post it if i find it.