Periodic Products CuLator Ultra 4.0

Binds stain-causing metals from swimming pool water like rust, iron, copper, cobalt, manganese, and many others. Prevents copper cyanurate stains.. Prevents swimming pool stains and discolored pool water by removing high levels of metals from pool water. Pool staining begins at .3 ppm. Protects swimming pool equipment.. Easy to use--place in pump basket and leave in for up to 4 months. Works as a metal control for stain-free and metal-free pool water. Works with all sequestering agents and chelators.. Prevents stains from forming, water discoloration, and hair from turning green.. No Phosphates and treats up to 20,000 gallons. 30-Day Money Back Guarantee!