I have been experimenting with making my own food. I used cucumber, spinach,carrots, green peppers,broccoli, spurlina, brine shrimp. I blended them with a bullet. I added a plain no additive geltine. I poured this concoction into a glass casserole dish. I cut it into 1/2 inch square cubes. When I put a piece in the tank. The fish approach it but then show no interest. after the cube starts to melt and break up, the fish will eat a few pieces. The food I buy at the pet store is a veggie, brine shrimp,spurlina mixture and the fish devour it. I wonder what I'm doing wrong?