ok so i was lookin at some spare peices i had for my tank stuff and pulled up an extra tube for my ac70. i thought mabye i could turn this into a co2 diffuser. my idea is take the tube. insert a motor, fitted with a longer extesion and a small peice of sponge, to turn the water and get lots of movement, insert the piping to it, attach it to the wall of the tank, place a sponge over the intake part and turn the motor on. this gives lots of water movement makein it easier for the co2 to gas into the water for the plants. could this work or should i just my money?