Both compressors produce 7+cfm which indicates they are 3/4hp. Each will easily operate 5 diffusers. You need not use 2" dia tubing; 1" or 1 1/4 ID air delivery to the shoreline then the 5/8" ID pipe will be adequate for either of these pumps. Due to high air volume check or change your air filter element annually.
Thanks a lot for the input Bill. I thought they would be ample, but wanted to make sure. I am excited to get the materials and get started. Probably a good idea to put a pressure gauge on the line coming out of the pump?
