Then just sit back and let it cycle for a couple weeks or a month. I'd top it off daily and just forget it's even there. The more fussing around you do, the more you risk screwing it up.
Just sit back for a bit. Give it a month to cycle and settle down. If you find any dead snails, remove them from the tank. Don't even bother testing it right now. It's just a waste of your testing solutions. You KNOW it's all whacked out right now and probably loaded with ammonia and nitrates. So why waste the tests on it?
If you have an algae problem in the tank, now is a good time to turn off the lights and tape some black poster board to all 4 sides of the tank. Don't feed it any light for a month.
Run your skimmer full blast.
Just top it off daily and forget about it. Test the water in the last week of August. You will hopefully see 0 ammonia, 0 nitrites and less than 20 nitrates. Check the pH, alkalinity and magnesium. Change about 50% of the water if you have nitrates over 10ppm.
Start stocking SLOWLY. Like 1 new coral or 1 new fish every 2 weeks.