My thanks to everyone that has helped me out so far.
I had an unfortunate water loss last night. I had backwashed my filter and then put it back to run. Unbeknownst to me, the lever didn't quite settle in the notch to run. When I got up this morning, I was down at least a third.
I am refilling now. I have bought salt and Instant Conditioner to replace the loss. Since the SWG will be playing catchup, do I need to add chlorine to help it along? I have tablets left over from when I used those that I believe are still good, or would I be better off adding liquid chlorine bleach? I am going to test as soon as the pool is back up to where it should be (and that's when I planned to add the salt and Instant Conditioner) . Is there anything else that I ought to do?
Thanks for any advice.