Pro-Treat 151 premium tablets penetrates help remove sludge that can plug drain pans and drain lines and foul humidifier pans. Kills odors associated with slime and sludge, minimizing maintenance problems from overflow and water damage caused by fouled pans, plugged traps or drain lines. Tablets are 100 percent soluble, easy-to-use and do not form any deposits in the pan or drain line. Approved for computer rooms. Dosage: 1 tablet per 3 ton per month.