The following foods: Milk, butter, margarine, real cheese, plain yogurt, most ice cream without gluten-containing add-ins. Vegetable oils, including canola. Plain fruits, vegetables (fresh, frozen and canned), meat, seafood, potatoes, eggs, nuts, nut butters, beans and legumes.
Alkalinity Balance, pH up, pH down, Calcium Balance, Water Stabilizer, and clarifier are all swim-safe chemicals. Wait about 20 minutes, and you are free to swim. We suggest adding algaecide, Super Erace, and shock at night, after everyone is out of the pool. It is safe to swim again the next day.
So here are the parameters for shocking your pool. If your water temperatures are below 50 Fahrenheit you should shock the pool once every 4 weeks. If your water temperatures are 50-69 you should shock the pool every 2 weeks. If your water temperatures are 70 you should shock your pool every week. Shock your pool if you have had a heavy rainstorm where you have to drain water out of the pool. A storm like this will drop algae, food for algae and other contaminates into the pool water.