I am new to this forum and to owning a pool. We just purchased a home at the end of March 2013 and I am trying to learn as much as I can about the pool. My pool has a spa attached to it with a small waterfall. The wall between the pool and spa also has a small hole opening.
Why would anyone design the pool with a hole between the pool and spa?
How would you maintain the water temperature of the spa to be different than the water temperature of the pool?
Wouldn't you be heating everything not just the spa? I know you can plug it but why would anyone design the pool this way? The only reason I can think of is so the spa never drains empty accidentally.
Also this pool does not have a heater which I do not understand how you have a spa without a heater.