I have an inground saltwater pool, about 14,000 gallons. I bought a test kit at the beginning of the summer (Taylor K-1005). After dealing with black algae spots a couple times, shocking the pool to get rid of it, and lots of reading on here, I know keeping my chlorine at 1-5ppm isn’t enough. I’m trying to figure out the best way to test my chlorine levels over 5ppm. I have everything else in my current kit, so I’d rather not buy a brand new kit for over $100 just to test my chlorine. What do I need to get to test for higher levels of chlorine without buying an entire kit with everything else?