I just found this website. I have an above ground pool 18 x 33 x 5 and it was green when I started the pump at start-up for the season. I have put so much chlorine in it and it is now cloudy and hazy. My numbers are all good except I don't know what "shock level" is for the chlorine. I have vacuumed it twice, back washed my filter everyday sometimes 2 x's a day. We opened it on Tuesday, May 31st. I have brushed everything everyday ( my steps are not in yet because it is too cold to get in). How do I get it crystal clear again? I have never had this much trouble before? We have had the pool for 6 years.