After spending about $6 for a 3.5oz box of mussel cubes, I decided to make my own fish food. In a blender I blended clams, shrimp, bay scallops, bloodworms, brine shrimp, silver sides, oyster, seaweed, carrot, and peas. I boiled some gelatin and added it to the rest. Then I poured it into ice cube trays & let it sit in the freezer until it froze. Then I put the cubes in a little freezer proof box. I clamped one piece with a veggie clip. My puffer, Steve, went after it immediately! He took big bites out of it. He was getting pretty full, and was starting to eat slower, when some of it broke off. It was funny watching him chase a piece around the tank, but not eating it. I think he ate so much he got a belly ache. He's got his tail wrapped around himself and is laying in his sleeping spot. I love puffers!