Check the listing for details. BioGuard SilkGuard Complete 3 Inch Chlorinating Tablets 7.5 lb - 2 Pack. Condition: New. Listed at 177.98 USD. An exclusive sanitizer formula that was built on 50 years of proven innovations. SilkGuard Complete upgrades pool care by providing better all-around performance. It works on all pool types, with all pumps, and in all applications. It's an exclusive, differentiated offering that simplifies your chlorine sanitizer selection. That's because BioGuard merged the best of their two previous technologies and added algae-fighting crystals for both sticks & tabs. SilkGuard Complete Sticks & Tabs are BioGuard's best technology for pool sanitation. These new sticks & tabs contain SmartGuard and are ideal for skimmer chlorination. The level of SmartGuard has been optimized for use with all types of pumps, including variable speed pool pumps. This improved formula of the new sticks & tabs can be used in chlorinators or floaters, if desired. The new sticks & tabs will continue to provide SilkGuard benefits, which means protection against corrosion, scale and metal staining, as well as softer feeling water. Finally, this new formulation includes an additional algicide to help add another layer of protection against troublesome algae blooms. Product Benefits: Softer-feeling water using SilkGuard technology Long-lasting performance thanks to SmartGuard technology Greater algae prevention by adding algae-killing crystals Dosage: It is recommended to start with 16 oz (2 sticks or 3" tabs) per 10,000 gallons in a skimmer Adjust the amount as needed to maintain 1-4 ppm free chlorine For chlorinators and floaters, adjust the output to maintain 1-4 ppm free chlorine