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Most metal control products are safe to add with no harm to bathers
Shock your pool at sundown and you can swim in it the next morning.
You don't have to swim to be strong However if you have the choice of adding it to your regime of exercise it is very good.
Depending on quantity added -- about half hour.
You don't need to wait -your filter system will feed it in gradually and it will spread through the water.
My pool store said wait 5 hours, but it probably depends on the amount and concentration (liquid or powder).
they swim as long as they can
A person can go swimming in a pool a few minutes after adding algae treatment and shock to the water. This is provided that a low dose was used. The manufacturers of the algae treatment recommend that a person waits 45 minutes to an hour to swim after adding a normal dose.
microscopic metal wires
Yes, "swim" does have a long vowel sound. The "i" in "swim" is pronounced as a long "i" sound, as in "ice" or "time."
maybe if you like to hurt yourself
Any time you like calcium is harmless