Make sure the pool is in the sun. The warmth of the sun naturally heats up your pool, which reduces the energy consumption of the heat pump or other pool heating. This in turn reduces your electricity bill. Besides, swimming in the sun is simply more pleasant, giving you an instant holiday feeling!
So, on a sunny day, preferably during the summer months, check which part of your garden gets the most hours of sun and also check if there are any shaded areas. You will probably notice that the pool is best positioned east in the garden. Also make sure your terrace is in the sun, because your beach chair should definitely not be in the shade, unless you choose to put it under a parasol.