Allows for quick, easy and accurate testing of your pond or lake for unhealthy conditions that can promote algae growth and harm fish. Each strip tests 5 critical properties: pH balance, alkalinity (buffering capacity), nitrate level, nitrite level and water hardness. Simply dip a strip in your pond or lake, wait 30 seconds, and compare each segment of the strip to the color chart on the label. Includes detailed instructions with explanations of each of the 5 properties, as well as suggested treatments for each in case of a poor test result. Contains 70 strips. Made in USA.