I DONT USE AIRSTONES ANYMORE, THEY CLOG AND STOP PRODUCING THE BUBBLES THEY DID WHEN NEW AFTER ABOUT 3 WEEKS FOR ME AND I CANNOT GET TO THEM TO REPLACE THEM . SO I TRIED THIS AND MAN IT WORKS LIKE NOTHING ELSE CAN! YOU JUST MAKE SUER YOUR FEED LINE GOES TO THE BOTTOM OF THE BUCKET AND PIERCE IT ABOUT 3 INCHES UP AND JUST PUSH YOUR AIRLINE THROUGH AND WHEN THE PUMP STARTS IT MAKES BULLBES JUST LIKE AN AQUARIUM POWER HEAD/VENTURI DEAL! IF YOUR AIR PUMP IS RUNNING YOU GOT BUBBLES, BUBBLES, BUBBLES. A PLUS TO PUTTING THE FEED LINE TO THE BOTTOM IS IF YOU PUT A BALL VALVE RIGHT AFTER YOUR PUMP INLINE YOU CAN SHUT OFF THE WATER FROM BACK SIPHONING WICH I FIND A GREAT PLUS BEAUSE WHEN I DO NUTE CHANGES I JUST LET IT BACK SIPHON AND IT DRAINS MY BUCKETS NEARLY DRY SO I GET A COMPLETE NUTE CHANGE AND IF THE POWER GOES OUT I JUST TURN THE VALVE OFF AND NO OVERFLOW. I JUST RECENTLY REPLACE THE BALL VALVE WITH A 1 INCH SPRINKLER VALVE WICH IS NORMALLY CLOSED AND PLUG IT IN TO A 24 VOLT TRANSFORMER FROM RADIO SHACK, WHEN ITS PLUGGED IN THE VALVE STAYS OPEN, IF POWER GOES OUT IT AUTOMATICALLY CLOSES PREVENTING OVERFLOW FROM BACK SIPHONING, THATS MY 2 CENTSCHECK OUT MY GALLERIE FOR A IMAGE, ITS NOT THE BEST BUT IT WILL SHOW YOU:smokin::thumbsup: