Are you able to add bleach both morning and evening? If so, great! Since you don't have any CYA right now, a good shock level for you would be around 10ppm. In your pool, each quart of 6% bleach will add a little over 1ppm of chlorine. So, each time you test, add enough bleach to get the chlorine back up to around 10ppm.
What kind of test kit are you using? If you haven't already done so, order a Taylor K-2006 or 2006C from the Amazon link in either mine, Ben's or Janet's signatures.
By the way --- no question is silly. If you don't know something, the only way to find out is to ask.

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