heating a small pool

[GraceByDesign]

A person in my neighborhood has about 5 rows of 1 1/2" PVC, about 8' or 10'long, painted black, plumbed into his Intex donut... Certainly would be cheap, but I dont know how effective it is, tho. He just has it propped up on the sunny side of the pool.

<--to return<--------------|
^
^
|----------->-----------|
^
^
|-----------<-----------|
^
^
|----------->-----------|
^
^
|-----------<--from filter<---

ETA the diagram did not show up correctly... the flow goes back and forth, not just up one side, tho Matt shot this idea out of the water anyway with his post below.