I created a very simple ss to track pool conditions based on the recommended levels in pool school. It also color codes the cells in your out of range based on whether you have an algae problem or not. I used 50 ppm cause I am currently battling black algae again. The charts tab also plots your results so you can visually see the impacts of adding chemicals. I am sure there is a better one out there but I am bored as heck at work today so I just thew this thing together.