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30 min
I would wait about 3 hours.
You can add salt any time its required
Adding salt to water will make it take longer for the water to boil. You should wait until the water is already boiling to add salt.
Approx. 5 to 15 minutes. Or enough time for the circulation system to disperse the chlorine. Or you could add it to the opposite side of the pool. Remember not to add the acid to closely to the skimmer or main drain.
There is no health problem swimming in a pool with salt added right away, or even while your adding it. It may be uncomfortable, you may feel the salt on your skin, and it may sting you eyes, but it's just like swimming in the ocean. There is nothing hazardous about salt in water, you'd feel safe to drink water with salt added to it right?
yes
alkalalalalalalalalalallalallalaas its an acid wait its an alkali wait its an acid wait its an alkali wait its a acid. OH I GIVEUP JUST GEUSS U OT 50%CHANCE
You don't need to wait -your filter system will feed it in gradually and it will spread through the water.
I'm not sure what you mean. If your qeustion is how long do you have to wait to swim after adding chlorine, it really depends. If you're adding chlorine to bring the level up to 2.0 or 3.0ppm, then wait minimum 1 hour before swimming, and be sure the filter is on. If you're shocking the pool and bringing the level up to 10-12ppm, you need to wait until the pool reaches a safe level as stated above.
Most metal control products are safe to add with no harm to bathers
I would wait alt least a moth before adding someone new to your lease. But really it all depends on who it is and how well you know the person.