GAME 4512 SolarPro XD1 Solar Pool Heater with Adapter for Intex and Bestway above Ground Pools Heat your pool water the GREEN way using free energy from the sun! Designed for any size above ground pool - no additional adaptors necessary On average increases the pool water 5 degrees in 3-8 days depending on the size of the pool Easy to install - no gas or electricity needed Space saving and aesthetically pleasing when compared to solar panels