More aggressive than preventative formulations, these products are designed to remove existing fouling. Included in this product line are Redux well rehabilitation products, the only ones designed specifically for remedial wells. Depending upon the nature of fouling, cleaners may be acidic or alkaline, oxidizing or reducing. Removal of deposits generally requires that equipment be taken off-line. Cleaning solutions are typically recirculated through affected system components. Spent cleaning solutions are not intended for discharge without further treatment.