That $ was estimate for past decade, so $3700/year. We have a 20x40 salt water pool and spend about that much per year. Theirs was chlorine so don’t know how much different the upkeep. What surprised me, keeps pool heated to 90F. Isn’t the point of a pool to cool off from the summer heat? Not sure how cold their area gets but we heat ours to 80F and only in the shoulder seasons of East TN.
I spent about $100 for my test kit and less than $100 in chemicals last year. I would find it difficult to spend $3700. I wonder why the maintenance on your pool is so much.
PSU