What coolant must I use in the PipeWorx 400 cooler, and what happens if I use a different coolant?

You must use Low Conductivity Coolant No. 043 810, which protects to -37°F (-38°C) and resists algae growth. Use of any coolant other than the one listed in the manual voids the warranty on any parts that come into contact with the coolant, including the pump and radiator. The cooler has a coolant capacity of 3 gallons (11.4 L). (Page 12)