Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to drastically reduce the cost to heat your swimming pool [title] Use a pool cover. [step] Evaporation is the largest source of energy loss for pools. This can easily be prevented by using a pool cover whenever the pool is not in use, which will minimize evaporation.

Ending1: You may also want to place a cover near the pool's wall so light comes through, and then turn on a fan to send additional heat to the pool. [title] Use a thick, heat-resistant cover. Ending2: Control evaporation : [substeps] Use a pool cover that covers the entirety of the pool. The cover should be raised above the water level. Ending3: It's the most effective way to reduce pool heating costs-it can reduce cost by as much as 50 to 70 percent. There are several pool cover options available on the market, including manual, semi-automatic, and automatic pool covers. Ending4: About 115% of pools use the pool cover. You can buy an old cover you can easily pick up and put back in the pool.

Answer format: ending1/ending2/ending3/ending4