I have 2 protank 2 and was ready to throw them out. Nothing but problems! Decided to try the airflow control valve and wow what a difference! Great having the draw options but there is no airflow obstruction, no leaking or gurgling! This is the way it supposed to be!
if you've had problems definitely get some of these! Only 6.00
if you've had problems definitely get some of these! Only 6.00