For normal use: If you add (1) MicroPRO Pack® at least every 30 days and top off the BT5 solution when it gets low, you will likely never need to drain and refill your BenchtopPRO®. The microbes contained in the MicroPRO Pack® remove contaminants from the degreasing solution through the process of bioremediation. For heavy use: Your BenchtopPRO® may require an annual drain and refill to remove any significant buildup of sludge.
