well i dont see how the placement of the gatevalve can effect the fluctuating water level, as it is right now the valve is serving no purpose, as it if 100% closed. i did fool around with the air supply and found out than when i add more air and lower that water level to compensate, i loose all fine adjustment of the water levlel( using the pipe to adjust height, since i dont think you can see that i have 1 1/4 pipe coming out of the skimmer and then i havea piece of 1" pipe wrapped in teflon tape that slides inside the 1 1/4" , thats my water height adjustment part) and the skimemr starts surging with lots of air. but if i turn it down my bubble size drops back down to less than 1mm and i get a stable foam head, water hieght and no surging
I just would really like to use some more air, so i am thinking that i need to make another air diffuser , maybe this way i can use more air and still have tiny bubbles and not have any surging
Tim