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4-way water test strips for pools and spas are a quick and easy way to test for total bromine or free chlorine,ph and total alkalinity at home.Test strips will allow you to make sure your pool is safe to swim in and can let you know if your chloinator or automatic chlorinator needs increasing or decresing as the bather load and weather conditions change which can save you time and money.they can also alert you to any potential problems before they occur.