Split off of this topic. JasonLion
Using Jason’s poolcalculator.com shows that your CSI is about a -0.70. A negative CSI means that the water is aggressive or tends to be corrosive. It can damage any mineral or metal based things like screws or ladders. A positive CSI means that the water tends to want to scale or be cloudy. I would recommend that you try to get your CSI to a -0.35 which you could do by raising your alkalinity to 100 and your calcium to 150. For your pool, you would add 3 lbs of baking soda and 8 lbs of Calcium Hardness Increaser.