What did they give you (ingredients). Have you bought a good test kit like the Taylor K-2006 yet? You can also go ahead and test your fill water. That way you will have an idea of the pH and alk of the water you will be adding and can plan accordingly. (You aren't filling from a well are you?)
How smart you are, to be reading and learning ahead of time. Lots of people here with a big mess on their hands and wishing they had done just that!

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Either pour it slowly into the skimmer and let it dissolve in the filter (keep pump running and don't backwash for about a week or you'll throw it right out, though.) Or, you can fill a stocking or old sock with it and hang it in front of a return jet. Regardless of how you decide to add it, wait a week and then test for it before deciding if you need to add more. Better to gradually get to your target than overshoot because the only way to correct high cya level is to do a partial drain.
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