Lo Chlor predissolved powder formula stabilizer makes for easy, quick application to pool
Empty contents into skimmer for sand filters
For Cartridge filters, mix in bucket of water and pour into pool
Instantly treats 3,000 gallons of water per 1 lb bag
Doseages: 
3lb for 10K gallons
4lb for 15k gallons
6lbs for 20k gallons
9lbs for 30k gallons