Chlorine tablets 200g for purifying your swimming pool water.
Amazon.com: Clorox Xtra Blue 40 Pound 80 Tab Pool and Spa 3 Inch Long Lasting Chlorinating Tablets
Pool Essentials 3-Inch Chlorine Tablets for Swimming Pools, 10 lbs - Walmart.com
HTH 3 in. Chlorinating Tablets Advanced 42055 - The Home Depot
3 Inch Pool Chlorine Tablets, 50 lbs - In The Swim | In The Swim
50 Kg Drum Cheap Pool Chlorine Tablets for Cleaning Swimming Pools - China Chemical Salt for Swimming Pool, Pool Chemicals Swimming | Made-in-China.com
Swim Best 50lb Bucket of 3" Swimming Pool Stabilized