Im using the cheap Amazon plastic air valves for Copepods and Phyto and they're really no good. Some are 0% to 100% in a quarter turn some never output 100%. The stainless ones look like 1/4 on-off which is no good.
What control valve/regulator do you use on your airhoses or did you build a manifold for air balancing?
What control valve/regulator do you use on your airhoses or did you build a manifold for air balancing?