About Services Markets Resources Training & Events Resources Download Categories COVID-19 & Aquatics Useful information and tools for safely operating your aquatic facility during the Coronavirus (COVID-19) pandemic. Safety Data Sheets (SDS) Download Safety Data Sheets (SDS) Horizon 2021 Catalog Download our catalog here. Helpful Tools & Information Useful information and tools for safely and efficiently operating your pool, spa or aquatic facility. Product Downloads Here you will find various information, advertisements, brochures, manuals and useful information on specific products. ADA Compliance Information On July 26, 2010, the US Department of Justice released updated ADA Standards for Accessible Design. Among the updates for a number of facility types were new requirements specifically for public swimming pools. Main Drain / Suction Safety Information Guidelines and information on suction safety laws including the Virginia Graeme Baker Pool & Spa Safety Act (VGB) and Minnesota's Abigail Taylor Pool Safety Act. Additional Information is also available here. Suction safety products can be found under Main Drain & Suction Safety in our online store. View All Downloads Calculators Shock (Superchlorination) You'll need to know your Combined Chlorine reading in parts per million (PPM) before you can use the Shock Calculator. We recommend shocking with either Calcium Hypochlorite (un-stabalized granular only, not tablets) or with Liquid Chlorine (Sodium Hypochlorite). Raise Chlorine Level You should keep your pool or spa Free Available Chlorine (FAC) level between 2.0 & 10.0 parts per million (PPM). *MN only. Consult your local codes as Chlorine limits vary state by state. Raise Total Alkalinity You should keep your pool or spa's Total Alkalinity at 60-180 parts per million (PPM). Lower (Neutralize) Chlorine Level Sometimes it becomes necessary to quickly reduce the level of chlorine in your pool or spa. One way is to add Sodium Thiosulfate to neutralize the excess chlorine. Raise Calcium Hardness You should keep your pool or spa's Calcium Hardness at 150-250 parts per million (PPM). Raise Cyanuric Acid (Stabilizer) Level Cyanuric Acid should only be used on outdoor swimming pools. It isn't necessary or recommended to use Cyanuric Acid on indoor facilities. You should keep your outdoor pool or spa's Cyanuric Acid level at 0-30 parts per million (PPM). Need help? Contact Us Shipping Information • Terms & Conditions • Privacy • Site Map NEWSLETTER SIGN-UP Home About Services Markets Resources Training & Events Search Online Store Shopping Cart Account Links News & Media © 2021 Horizon Pool Supply All rights reserved. Website by Bicycle Theory. Powered by VenYou™ CMS.