"It aint redneck if it works"

Background story:

I got a little 4500 gallon pool for the kids

Since we live in Michigan, it doesn't seem to get past 70 and I tried a few different ways to heat it

I have a "solar cover" on
Might so more to prevent heat loss then to actually aid in heating it up

At some point I bought a "heat pump"
Ran that for 3 days straight, no difference

Finally, I came across some guy selling a heat exchanges for a torpedo heater

I figured, why not ?

I put the whole thing together this morning (pool temp being 69.3f)

Fired her up and measured the outcoming water