Thank you Brian. I'm with you sir and couldn't agree more! I most certainly don't want to send people down the wrong path or worse, be responsible for killing their fish pond!
Side Note: I know you are very experienced in solar power, so please excuse me if I'm insulting your intelligence.....
If you mess around with a direct drive compressor. Keep in mind "off the shelf" LCB's are generally set for water pumping. Usually around 14V. Most 12VDC compressors (in my experience) will run too fast at 14V and burn out. Where ever you buy your solar components ask for a custom LCB set at 12.5-13V. FWIW
