Today it was 79 degrees but the pool water is still in the 60’s. Sure would have been nice to get in. So looking for a gas heater so that if weekend temps are warm enough we could crank the heater overnight and swim all weekend. It’s a small pool and I’d definitely like to keep the heater as economical as possible. Where do I shop for gas heaters? Any brand or website recommendations? How to find sales?? Thanks!