As my pool volume doesn't change, I thought I could create a spreadsheet using the formula in the pool calculator. It would be a grid - along the top is my target FC along the side is my current FC. Each cell would have the amount that I need to add. I could then print it off and put it in my test kit box, and that way i can easily look up what I need to add.
My question then, is - what is the formula that tells you how much bleach to add to get from actual FC to your target FC?