After the algaecide is added, you should wait 15 to 20 minutes before going in. Be sure to test your water for chlorine and pH levels, so your pool or spa will be safe and comfortable for your users. Kem-Tek algaecides are not toxic to humans.
The Recommended Daily Allowance (RDA) of magnesium for young adults is around 400 mg/day for men and 310 mg/day for women. For adults over 30, the RDA is 420 mg/day for men and 320 mg/day for women.
Male teenagers ages 14 to 18 need 11 milligrams of iron per day, while female teenagers ages 14 to 18 need 15 milligrams of iron per day. Women ages 19 to 50 need 18 milligrams of iron per day, while men ages 19 and over and women ages 51 and over need only 8 milligrams per day.