We are soon going to be starting to dig. I met with my PB yesterday, and was asking about heating the pool and spa. He says that the way they usually set them up is that they're typically both kept at the same temperature, with essentially shared water, I assume filtered together. You can then push a button, a valve will switch, and the spa will be heated exclusively, so that you can get it to a much higher temperature.
I'm not sure I like this setup. In the winter, for example, I'd love to leave the pool water unheated, and keep the spa and 70 or 80 or whatever, so that we can heat it up to 100 in not too long. Note that I do *not* have a spillover, so I'd think the water could be kept somewhat separated...
I asked if they could be maintained consistently at separate temperatures, and he said
"We can set the system up that way, but there are issues with maintaining the water level, and chemical balance."
I'm going to chat with him about it the next time I see him, but in the meantime - can someone clue me in on what the difference might be?
Does anyone plumb their pool and spa the way I described, where it's easy to maintain the spa at a much higher temperature than the pool?