Someone told me to post pics of this on here. I got this idea from the ever-so-wise bundy. All that it is is an airstone going into a bottle with another peice of tubing that goes above the waterline and into your tank. The water diffuses into the air, through Newtons 2nd law (every action has an opposite reaction) air gets pushed in throught the airstone, hydrated by the bubbling and out through the tube above the water and forced into your tank. Click here for pics. You have to go backwards, Yahoo! Photos put them in the wrong order. And please excuse IMG_022 I dont know what the camera was doing there, probably my fault.