Having a pool is a luxury. Because of this, everything pool-related is expensive–from chemicals, to parts, to electricity, to repairs. There are ways to save money, though.
First and foremost, fire your pool guy. We are expensive. This will require you to do some studying. Go to the library and check out a book on swimming pool maintenance (don’t buy one, they’re all the same), and spend the time to learn about your pool–really learn about it. It seems complicated (and I guess it can be in a way–which is why we get paid the big bucks???), but the knowledge you obtain will save you money and time, every month. You paid $30,000+ for your pool–take the time to know how to care for it and you’ll save time actually caring for it!