When I first got my pool, I didn’t think I could afford to heat it. As a result, I only got to enjoy it for a few months a year. It seemed like a waste of space and money, so I started looking into inexpensive heating options and stumbled upon solar sun rings. Those things cost hardly anything! They are made of two layers of vinyl which absorb the sunlight and use it to heat a pool. I bought enough for my pool, and so far they have been able to keep it warm even on cool days when we would have been previously unable to swim.