esshup may hold the key !! Back on this pressure saga/ When a diffuser has a cfm operating range it is for a reason. 4 psi to one Vertex Station is only when you are beyond the cfm guideline (dont go there then)When you put two Vertex Air Stations with the same short hose the reading on the digital is .92 psi. The Aqua Control tube measures 2.13 psi with the Gast 0523 going to one station approx 4.1 cfm being pumped.Im guess'n that tube usually gets an average of 1.5 o 2.2 cfm for maximum lift depending on a single dual piston pump driving 2 or 3 stations. If you want to use the Gast 0523 compressor to a single air station in shallow or deep then go to the new Vertex XL5 and enjoy the benefits of FlowControl and StableTrak operating cfm range 2.5 to 6.25
