Every house I have ever bought, the first thing I do is jack up the temp on the hot water heater to the max. If you are not careful you will scald your self. I once had a master bath with a huge hot tub that I kept at 104 degrees. My pools always had heaters with one being a 350,00 BTU gas heater. One morning I jumped in and freaked. It was so fucking hot as I forgot to turn the heater off. It was a big pool, 20 by 40 kidney shaped . Most people would have seen the amount of steam rising from the water and tested it before jumping in. I never did that again.
I was also a freak about keeping my pools clean and would take the vacuum hose, put on my scuba gear and get every piece of dirt I could find, It was definitely one of the cleanest pools in the state.