BioGuard Oxysheen is a chlorine-free, stabiliser-free oxidiser treatment for swimming and spa pools. It is easy to use, fast dissolving and swimming can resume one hour after treatment. This fast acting and easy to use oxidiser helps maintain sparkling clear water with regular use. It destroys organic wastes and eliminates odours. Oxysheen contains Potassium Peroxymonopersulfate and is chlorine and stabiliser free.