About a week ago we had 4 teenagers in the hot tub for a few hours. I didn’t add any chlorine before they got in (stupid me) after they got out I checked it and the FC was 0. I immediately brought it to shock level of 12. Next morning I had cloudy water. Over the next few days I have been bringing it back to 12 ppm. On average it’s was loosing around 7 to 9 ppm in a 9 to 12 hour period every day. The last three days it’s been loosing about 5 ppm in a 20 hour period. Is this right to still be loosing this much or does the lower the chlorine level gets is reflect a lower loss over time? The water at this time maybe has a slight haze to it but nowhere what it was like when I started. Any help would be greatly appreciated.