... , high salinity feed water competitive price and excellent effect RO Antiscalant chemical Nalco Nalco 3D TRASAR Descriptions: Nalco PermaTreat ... PC-191 is highly effective liquid RO antiscalant.It is suitable to treat brackish, high salinity, ... effluent feed-waters.It can be used in reverse osmosis (RO), nano-filtration (NF) and ultra-filtration (UF) system. ...