Flow Rate Initial Dosage Maintenance**
Up to 1,000 gpd ½ lbs. per day for 3 days ½ lb. per week
Up to 5,000 gpd ½ lbs. per day for 3 days 1lb. per week
Up to 20,000 gpd 5 lbs.* 1½ lb. per week
Up to 50,000 gpd 8 lbs.* 2 lb. per week
Up to 250,000 gpd 15 lbs.* ¼ lb. per day
Up to 500,000 gpd 25 lbs.* ½ lb. per day
Up to 1 mgd 50 lbs.* 1 lb. per day
Up to 5 mgd 50 lbs. per mgd* 1 lb. per mgd per day
Up to 12 mgd 50 lbs. per mgd* ¾ lb. per mgd per day
Up to 100 mgd 30 lbs. per mgd* ½ lb. per mgd per day

* Spread this initial dosage out over the course of 10 days.
** Add as regularly as possible. If it is required to miss one day, add that day’s product with the next dosage.

Dosage rate will vary with flow rates, retention times and system variations. The rates above are for a typical, well maintained system.