They also like a homemade frozen food. I use a very simple 1:1 volume ratio of scallops to shrimp. Cut nori into 5-7mm squares and soak the nori for several minutes in RO water to soften the nori. Blend the scallops and shrimp into bite sized fish morsels, stir in the nori (don't blend the nori--I just pour the nori/water mixture through a strainer and then dump the nori into the blend), add some marine ZOE or similar vitamins, stir, put in ziplock bag, flatten, then freeze. This is good stuff and a very simple formula. When I feed, I trim about 3-4 mm strips and cut into small morsels the size of small to medium pellots. If done properly, you probably don't even need to trim when you prepare to feed.