There was a post on this site that I can't find. It was a method that allows back calculating pool volume using the alkalinity test I think...anyone have it handy?
Early on I tweaked my pool and spa volumes I use in pool math by going by how the FC DPD drop test reacted to the amount of fresh chlorine I added. I have it dialed in now and was probably off by about 3K gallons at first.
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