Here is my first youtube video of me feeding my fish.
http://www.youtube.com/watch?v=ZhsijMTNXfc

I also found airstones for 33 cents each on amazon.com. The price for shipping 100 stones is only 6.49. I think that I can make a ring out of that black drip irrigation tubing and use the drip tool to make a hole and push them right in. At that price I can just plug new ones in the ring as the old ones clog up.
http://www.amazon.com/gp/product/B0002AQHCS/ref=ord_cart_shr?ie=UTF8&m=A33WNC5RWNU3Z1