As you are fully aware the cost to heat your swimming pool is extremely high, and also has an impact on the environment by using gas, electricity or oil to provide the heating. Therefore the wise option is to have solar panels installed, which will use the suns energy instead. The system is quick and easy to install, and will be virtually maintenance free.
There will be suitable position required to site the panels, either on a south facing roof or they can be fixed on A-frames at ground level.
Ample Energy Services will design the system for you, by calculating the panels required from your pool surface area and your desired temperature for the pool. There will be back up heat still required for your pool, but this is for when the sun cannot generate enough power through the panels alone.