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You should leave the cover off for MPS as well. Any time you are shocking, you are oxidizing waste products out of the water and into the air, "gas-off" is still occurring. I always recommend to my customers to leave the cover off for 1/2 hr. after any shock. This allows the chemicals to work at their full potential and will extend the life of your cover.
T&C, are you saying you should leave the cover off for both regular dosing and Shocking with MPS? I always thought that was an advantage MPS had over dichlor.
Is adding dichlor after soaking considered shocking?
Not neccessarily. Adding a small amount will only boost your sanitizer level, but adding a larger dose will begin the oxidation process and "shock" the tub. Either consult your local dealer or the back of your dichlor bottle to see how much it will take to shock the tub. Most bottles use the term "superchlorination" to reference shocking with dichlor.
It has been recommened here on the forum that when you add dichlor and MPS that the cover should be left off for about 20 minutes and run the pumps to protect the cover.When adding dichlor after each soak, do you still need to leave the cover off for a while?Tony
You got 5 years out of your cover? I'm jealous and impressed. My Sundance cover is just over 4 years old and is plenty heavy. I got just over 3 years out of it. Physically it's in great shape- the vinyl has held up really well- but it's extremely waterlogged. I'm going with one of doc's covers- and am getting the double wrap option, hoping to extend the time between water loggings.You must be doing something very right.