Hayward Star-Clear Models: C1200 C12002 C12002S C17502 C17502S C751 C751 - Page 4

ALGAE CONTROL Algae is a form of plant life which can vary in size from a few thousandths of an inch to the size of a small tree. Of the many forms of algae, those most frequently found in swimming pool water are microscopic in size and green in color. Algae readily grows in sunlight and can, under favorable conditions, quickly overgrow a swimming pool turning it completely green in just a few hours. On the other hand, swimming pool water can be kept unfavorable to algae growth simply by maintaining a chlorine level of at least 1.0 ppm in the water at all times. The chlorine level should be checked at least once a day using a suitable test kit. If algae condition develops and the pool water "blooms" green, superchlorination of the pool will be necessary to clear it. Add unstabilized granular chlorine, or liquid chlorine. Follow chemical manufacturer's recommendation for superchlorination. The algae will quickly become inactive and can then be removed by the filter. Live algae, on the other hand, multiplies so fast that the filter cannot keep up with its growth rate. When correctly used, commercial algaecides are effective against algae, though algaecides should be used in conjunction with, and not as a substitute for, regular chlorination or superchlorination. Maintaining a chlorine level of at least 1.0 ppm in the pool water at all times is the most effective way to prevent algae growth in swimming pools. POOL CHEMISTRY GUIDELINES SUGGESTED POOL CHEMISTRY LEVELS pH 7.2 to 7.6 ACTION REQUIRED TO CORRECT POOL CHEMISTRY TO RAISE TO LOWER Add Soda Ash Add Muriatic Acid or Sodium Bisulphate TOTAL ALKALINITY 100 to 130 ppm Add Sodium Bicarbonate Add Muriatic Acid CHLORINE (UNSTABILIZED) 0.3 to 1.0 ppm Add Chlorine Chemical No action - chlorine will naturally dissipate CHLORINE (STABILIZED) CHLORINE STABILIZER (Cyanuric Acid) 1.0 to 3.0 ppm Add Chlorine Chemical 40 to 70 ppm Add Stabilizer No action - chlorine will naturally dissipate Dilution - partially drain & refill pool with water that has not been treated with Cyanuric Acid. NOTE: ANSI/NSPI-4 Article 4, standard for above-ground and on-ground pools, advises that components such as the filtration system, pumps and heater be positioned so as to prevent their being used as a means of access to the pool by young children. Rev. 10/98 HAYWARD POOL PRODUCTS, INC. Corporate Headquarters: 620 Division Street Elizabeth, NJ 07207 Canada: 2880 Plymouth Drive Oakville, Ontario L6H 5R4 U.S.A.: I Hayward Industrial Drive Clemmons, NC 27012 Europe: Parc Industriel de la plaine de FAin Allee des Chenes 01150 Saint Vulbas France 2935 Sidco Drive Nashville, TN 37204 2875 Pomona Blvd. Pomona. CA 91768 © 1999 Hayward Printed in U.S.A.