cmartin, If you want the spec sheet for the Gast Pump it is as follows.
http://www.gastmfg.com/pdf/rotvane/0532_1032_1532_series.pdf It is not 1.5 cfm at 5 psi. It is however around 1.25 cfm at 5 psi. It is more than enough for my smaller pond of .25 acres. It is also inexpensive and inexpensive to run ( for my application around $9 /year.)
For those who want a good system and have a smaller pond/application they should consider this as it works and is not going to break the bank.
Also as a note I use Gast pumps in the Industrial plants I am responsible for around the world and they have a great service record and are easy to maintain. Thus what more could you ask for.
