I made a DIY Air stone skimmer over a year ago and it worked pretty well. The problem I have is that I've gone through 2 air pumps already and I hate using the wood air stones. I have an extra pump laying around and would like to convert to use on the skimmer. Does anyone know of a good venturi valve that I can connect that would work? I see some on the internet but they seem to have a metal spring that probably wouldn't be a good idea and I have no idea if they would work. Any suggestions or DIY's?