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I generally leave the cover off 20 minutes when using 6 PPM for shocking and 1 hour if I hit it harder with more chlorine. I'm not that stick with this rule at times but if I have the time (weekends) I try to stick with this.Regular chlorination, 3 PPM, gets about 5 min or less.
How do you know how much chlorine gives you 6 PPM and 3 PPM?
Are the Leisure Time test strips an OK way to test these levels?
Vinny,My normal dichlor dose is 1 teaspoon after I get out of the water. When I shocked I use 3 tablespoons of dichlor. Too much I know my calculations were off because...well it's a long story...but mostly because I'm stupid. Should the free chlorine level be close to 0 the next day say 24 hrs later or will it be longer before it comes to 0. I realize now why people use MPS to shock so you can use the tub sooner. The water smelled ok, but the reading was definately over 5ppm 12 hours later.
The problem I see with MPS is it leaves the kits with a false reading on combined chlorine, so it's impossible to really determine if you have any unless you stopped soaking, didn't add chlorine and tested your water with something every day for a week (?) to see if the combined chlorine goes away.
MPS interferes with chlorine reading? Just combined, not free? For how long after adding- a week? How is that possible, if some people shock with it weekly?