H Hydrex™ Cooling System Chemicals For the treatment of cooling systems, Hydrex™ offers the 2000 series. Sludge treatment I Ionpro™ LX Ionpro™ LX systems produce high purity water with low bacteria levels. Ion exchange & Deionisation W WAPOL Wapol polish reverse osmosis permeate to produce high purity water of up to 18 MΩ.cm. Ion exchange & Deionisation