polymers such as residual coagulants, iron or aluminum-rich silica. ProTec RO C is effective in reducing fouling of colloidal matter in sea and brackish surface waters, and industrial... About Membrane Cleaning About Membrane Storage About Membrane Data and Trending Contacts Blog Protec RO C For Preventing Fouling by Organics, Biological Material, Colloids What... is an antifoulant? Besides dissolved salts that can form scales, there are organic and biological materials that can also foul membranes. Colloids, silt, other fine particulates also...