Hi everyone, thanks for this forum, loads of information here. I got the TFT100 test kit so I have results to share and questions about those, but first I thought I should know the size of my pool. Previous owner doesn't really know (he guessed 35k-40k gallons). I'm including photos and measurements here in case there's some sort of calculation that can be done.
Pool is 8.5 ft deep to the water line in the deep end. Tanning shelf on the shallow end next to the spa. Spa is 7 ft in diameter with a seat all the way around.