I'm still a newbie - we have had the house with pool just over a year, and I am still learning about it. Our pool has a spa that flows into it. We run the filter from 8 to 5 daily. At night, the spa shows a considerable water drop (like 7" for the 7' diameter spa) - which is then replenished each morning with the float water filler. I'm not sure whether this water drop represents the collective evaporation loss over the entire pool + spa surface area, or just the spa. So, I'm unsure about how to do a bucket test for evaporation, and whether to focus on the spa or pool (or both) for leak detection.
I'd appreciate any guidance/pointers/advice from all of you more experienced pool people. Thanks.