Sam,
I wasn,t suggesting a needle valve, just some type of flow restrictor valve on each line after the split. There are tube connectors that will do this.
I would have thought that any difference in resistance in line A or B, either in the length of tubing ( which will have a surface roughness) or the % efficiency (if same type) or size (if different type) of diffuser would cause gas to flow by the easiest route possible. This would give an uneven distribution of gas. In the worst case gas would flow through one diffuser only, defeating the point of using two diffusers to distribute gas evenly to each end of the tank. I would suspect that in any case, unless you balance the flow/ resistance to flow; you will get an uneven diffusion from each outlet.
Just my thoughts.
Neil
I wasn,t suggesting a needle valve, just some type of flow restrictor valve on each line after the split. There are tube connectors that will do this.
I would have thought that any difference in resistance in line A or B, either in the length of tubing ( which will have a surface roughness) or the % efficiency (if same type) or size (if different type) of diffuser would cause gas to flow by the easiest route possible. This would give an uneven distribution of gas. In the worst case gas would flow through one diffuser only, defeating the point of using two diffusers to distribute gas evenly to each end of the tank. I would suspect that in any case, unless you balance the flow/ resistance to flow; you will get an uneven diffusion from each outlet.
Just my thoughts.
Neil