FSS ProGuard Green D3 is Huguenot Laboratories speciality formulated for the Bypass Feeder Design (BFD) equipment family. This product line is designed to be fed at a 1% use concentration with the portable and permanent style of BFD series systems. The ProGuard Green D series product line is a multipurpose corrosion and biostatic inhibiting technology that is designed to minimize corrosion while protecting the systems components from the damaging effects MIC (Microbiological Induced Corrosion).