Hi everyone, I have a natural gas heater 250k BTU and a pool size 21k gallons. Our average summer weather temperature is in the low 70s and I do not have much direct sun hitting the pool. I am wondering what the best way to use the heater is. i.e. do I keep it on always and set it to the desired temperature (82-84F) and just let it regulate itself or do I keep it off most of the time and only turn it on when I know we plan to use the pool? Our pool usage is best described as inconsistent. Also please note that I mostly keep the pump running 12 hours a day only and usually at night. Your thoughts are much appreciated!