My pool will be ready to swim in when the outside temp is only in the 70s. I can show you how to install a makeshift solar heating system for your pool that will not cost you more than $500 compared to the average price of solar heating that costs upwards of 3k. I will show you via Skype how to install this solar system and it only takes 2 items that you can get from your local hardware store. Extend your swimming season and get your pool heated quickly and for free, no more expensive power bills and anyone can do this it's so easy. If you want to know how then order this gig.