OK, figured out the borax question (duh, use the pool calculator!) and have added the borax, because the cyanuric acid did indeed drop the pH further. But I still wonder, in a perfect world what is the ideal order for adding the chemicals?

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Thanks Big Dave.

The pH I gave was from before the cyanuric acid went in - the after value was 7.3. I found the answer to determining the amount of borax (duh -the Pool Calculator!), but I am still curious what the order should be for adding chemicals, even though the answer is now

Alison