Protect your swimming pool and enjoy clean, clear water with these easy-to-use chlorine 3-inch tablets. HTH Pool Care 3-inch Chlorine Tabs Swimming Pool Chlorinating Sanitizer 40-lb Tub will keep your pool for up to 1 week. Easy to use. Use in floater, feeder or skimmer basket. Keep out of Reach Active Ingredients: Trichloro-S-Triazinetrione 92.4% Other Ingredients 7.6% 3-inch Pool Care Swimming Pool Chlorine Tabs Sanitizer and clarifier Easy to use Use in floater, feeder or skimmer basket