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.
The recommended amounts of calcium for adults are as follows: 1  For pre-menopausal women 25-50 years old and post-menopausal women on estrogen replacement therapy: 1,000-1,200 milligrams of calcium per day. 1,500 milligrams of calcium per day is recommended for pregnant or lactating women.