Pond Boss Forums AERATION Systems questions Presure volume?

Donno:

Shouldn't the volume stay the same? Air is compressible. If a diffuser needs say 1 cfm to work at optimum, wouldn't it need that same cfm at all depths? As the diffuser disc goes deeper into the pond, it needs more psi to operate. But, at depth, since air is compressible, wouldn't the cfm stay the same even though pressure increases? Pressure increases at the compressor to overcome the psi needed at depth.

The diffuser would "see" the same opening psi as it would on the surface.

Take a diffuser disc at 20' depth, just to easily round off numbers. .5 psi for every foot of depth needed, correct? So, at 20' depth, you would be seeing 11 psi on the compressor, but the diffuser would still only be seeing 1 psi in the airline vs. the psi on the outside of the diffuser.

Since air is compressible, what would be the volume of air at 11 psi vs. at 1 psi? Would it stay the same? (I don't know)