canyon, I believe the pondlyfe system uses a piston pump that is rated much higher than 2 psi. The confusion may be coming from all the "2"s in their specs...

2 CFM,
2 amps,
and I think you will find that the vertex double diffusers require 2 psi to operate.

If the pump can handle 30 foot depths, that tells me it can put out around 15 psi.


Fish on!,
Noel