I would check the hardness again, because you don't lose hardness by any way but draining. You need to add more bleach to bring you back to a ppm of 12 right away. Your other numbers are fine now - so don't add anything else. You don't need hardness in a vinyl liner pool. So you are good to go - just keep the bleach going in until you hold chlorine overnight. You can put stabalizer in by putting it in a sock, tying it to a skimmer pole and placing it in front of a return jet ( a smart perosn on this forum thought of it!) , this way you can keep backwashing the algae that was killed out of the pool. If you put the stabalizer in the skimmer you shouldn't backwash for a week.