Hope this helps - This summer I will be posting a step by step installation of a DIY direct solar pumping design that I have been using for a while now. I will explain/show where I buy the components and how to assemble them. If a person is somewhat handy it can be built for around $750. (excluding diffuser assembly(s), manifold if 2 diffusers are to be run, and air line(s).
The system:
1) Direct pumping, no batteries, only day time running
2) 8' or less max pond depth, 12V diaphragm pump
2) 7.5 hrs minimum run time during MN summer, 1.2 max CFM
3) 4 hrs minimum run time during MN winter, 1.2 max CFM
That would be AWESOME!! Just out of curiosity, what would it take to be able to pump in deeper water? A bigger compressor and more panels I am guessing??? I am veryyy interested in this! $750 is about 1/8th of what I thought a solar setup would run!! I will be leaving for Colorado the last week of June...hint hint!!
Thanks again for all the info!