DIY pool heaters: anyone use one of these with good results?

[USBB]

Has anyone here made one of these and had good results using it? I have a big yard with lots of sun. Looking for a way to utilize that energy.

https://youtu.be/HTbNKufpOq8

 

[pabeader]

This is one of those subjects that create a debate amongst the hive mind here. There are sound thermodynamic reasons why DIY doesn't work well, but there sure are a lot of folks on the internet, doing it and enjoying the results. If you decide to try it, please let us know your results.