All the responses have included just chemical regen options, but ORP can be maintained with electricity. FSL manufactures an Electroletically Regenaration Unit that maintains ORP without adding in needless water (H2O2). The capitol investment is high but the ROI is quick, if all cost considered. With chemical regen system costs would include the chemistries, HCL and Chlorine/H2O2/or Sodium Chlorite. The amount of HCL used in any system will depend on the type of Oxidizer. The waste cost is a factor, in house treatment or off sight treatments. With the FSL unit the regen cells plate out almost pure copper that can be sold, with no waste treatment discharge. HCl is used to maintain Normality but at a much lower consumption rate than the chemical oxidizers. I have seen two diffirent insallation in the New England area that has been up and running. I do not represent FSL. I'm just giving other alternatives for Cupric Chloride Regen. I am unsure of any down side to this system. If anyone has any input please feel free to comment. ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################