What is the best way to make my durso pipe always flow water and stop the noise? right now i have about a 1/4 hole on the top with a piece of air hose in it. ive tried 1/16 all the way to 1/4 and it still dont suck water 24/7. what i mean is it will suck water then release air then suck water. but it makes that guggle sound everytime. its noisy. one time i had a air hose in the intake of the durso pipe and it worked great and never was nosiy like a toliet. but it stopped working. the water level dont rise up and down. so its a start but i need to know how to stop the noise. i basically want to know how my lfs got theres so quite. it looked like they had a hole drilled in the side at the top. any help would help.