Hello. We had a professional open our pool 4 days ago. He put in 2 bags of shock. We tested the next day and it read no chlorine. We added 4 3" pucks, tested the next day, still nothing. Since then, we have added 2 full 121 oz jugs of 8% bleach. Still not registering any chlorine. It hasn't even been that hot or sunny. Everything else on the test strip is within normal ranges (ph, etc). Now what?