sweeTang21;2473102; said:you can substitute feed with algae sheets. You should be able to get them at any pet store. A veggie clip will hold it under water. Lettuce is also sometimes used, same with spinach. You can also buy some live algae for feeding purposes. There is a lot of algae that fish and what not will not touch, but do your research and you should be able to find an algae they will eat.