Yep. Algae wafers. They are also called veggie rounds, algae disks, and veggie wafers. They will also appreciate any kind of sinking pellets like earchworm pellets, plankton pellets, etc. Variety is the key.
Thanx a lot bud; sorry for the late reply. I got some algae wafers and everything is cool now. I can't believe how fast the two of them are growing - plus they keep the tank amazingly clean, and they look pretty happening too.
They also like the shrimp pellets and fresh veggies. Cut up some zucchinI and weigh it down with a spoon stuck in it or hold it with a veggie clip. You will be amazed at how excited they get with fresh food. The wafers are great, but they need variety in their diet like any other fish, so experiment with the veggies and let us know! Sweet potato is another good one to try!