Our 3" Stabilized Chlorine Tabs are slow dissolving and has 90% available chlorine. They are slow eroding, which makes it effective for use in automatic chlorinators or floaters. Use 1 Tablet per 7,500 Gallons per week. Use as directed. do not mix with other chemicals or use in your pool skimmer.
Note: Product sent has the same chemical make-up, but may not look exactly like the item pictured above.