As per your suggestion, I purchased 4 medium pore diffusers and raised them to a depth of 5’ 8" by building a platform out of 1 ½” PVC piping. This elevated height caused the pressure to drop to 3.5 psi and it caused the boil to be more robust. Along with the pressure gauge you suggested, I also added a fan below the Hiblow compressor. The fan is controlled by a thermostat switch that is attached to the outgoing tubing that is a radiator hose the 1st 30”. The switch turns the fan on when the hose is 100 degrees and turns the fan off when the hose cools to 85 degrees. I think I now have the best setup for my situation. Thanks for your help on this matter - you have been invaluable!