Ok so here in maine we have very few months to use our swimming pools so I'm gonna build a DIY wood fired pool heater with a barrel stove some copper coil and a small pump. Waiting for the barrel stove kit to come. Idea is to make a shelf for the coil to sit on high in the barrel and run the two ends out the back. The two ends will go to a few elbows and then some more copper pipe and then to some hose with a pump circulating the water from the pool. Have a pump already from a failed solar system I have. Let's hope I can expand my pool season. Anyone done anything similar?