The Solar Pool Heater happened because of a ridiculously cool summer and it was to cold to get in the water. I started the solar pool heater with garden hoses. I use a 12 volt DC pump that pushes 109 gallons per hour. I think the solar pool heater runs half of that due to the resistance of 550 foot of 1 1/4 inch hose.
Solar Links:
https://www.youtube.com/channel/UCNfgau-qtgZXmqut5SDQMyA
https://www.facebook.com/groups/wesley7777w
https://twitter.com/SolarandWindDIY