Brand: Jack's Magic

Features:

Jack's Magic Blue Stuff helps in removing heavy metals from pool water preventing metal stains from Copper, Iron and Magnesium when chlorine is added in pool water. The Blue Magic also assists in preventing scaling from happening is a swimming pool.

Jack's Magic is also tolerant to high chlorine levels and can be used in pools and fountains with high chlorine levels. The Blue Stuff is made with safe chemical formula and is very safe to use in all pool finishes. 

For Initial Dose: Use 1 quart per 10,000 gallons; for Maintenance Dose: Use 6-8 ounces per 10,000 gallons weekly.