Replacing existing fill media with genuine factory replacement fill ensures 100% operational thermal performance, why risk under performance to save a few dollars? Only EVAPCO can guarantee Aqua-Cool equipment performance with certainty by reviewing the original equipment design conditions and selection criteria. By providing the units serial number at the time of quotation request the "as built" design files can be referenced by EVAPCO and the correct replacement fill design and quantities supplied. EVAPCO sales engineers can validate fill media selections using EVAPCO software to cross check fill suitability and thermal performance. No other supplier can cross reference "as built" project files or unit selection data for Aqua-Cool products. Why install low quality fill in a premium quality cooling tower? Its like buying a high performance car and installing low performance tires on it!