Fill the pool slowly with a thin hose. A thinner stream of water will heat more quickly when filling your pool. Use a hose that is ⅝ or ½ inch in diameter to slowly fill the pool. Try keeping the stream around half an inch in diameter to allow it to take in heat while still filling the pool at a decent rate.
What is the best way to heat a pool?
A water heater is the most effective way to heat your pool. A gas heater can raise the temperature of your pool water by 30 degrees Fahrenheit or more, greatly extending your pool season. These heaters use either natural gas or propane to heat the water in your pool.
How does the sunlight heat swimming pool water?
The water that flows through the filter circuit is diverted to the solar heating system.
The water is filtered and then heated with the help of swimming pool solar collectors. Lastly,the water is transferred back into the swimming pool itself. How to heat my Pool?
Heat Insulation. If you are planning to build a swimming pool,you can use Insulation to reduce heat loss.
Burning Wood. A much more primitive and simpler way to heat the pool is to use fire. Black Hose. This method of working uses the heat provided by the sun to heat your swimming pool. Dark color tends to absorb more heat than a light color. Solar Cover. Most of the heat of a swimming pool is lost through evaporation. Light from the sun heats the water. Solar Rings. An alternative to solar cover is solar rings. Just like solar covers,solar rings reduce the evaporation process to 10%,if not completely. Liquid Solar Cover. These covers work similarly to physical solar covers. They generate a thin liquid line that covers the pool and reduces evaporation. Windproof Pool Enclosure. A windproof pool enclosure is one of the best ways to keep the heat of the pool and keep it from evaporation. Using Solar Panels. Solar panels are used to convert heat energy into electric energy. This electricity can then run the water heater,heat the swimming pool in minutes. Using Solar Mats. Solar mats are used in the same way as solar panels. Using A Pool Heat Pump. A heat pump acts as solar mats but is not reliant on sunlight. 
