Rainbow 300-29X automatic chlorine/bromine commercial and high capacity pool/spa feeder * Heavy duty 1/2-inch control valve and tubing optimizes flow and erosion to provide larger amounts of sanitizer * Dispenses 8.5 pounds of 1-inch Trichlor tablets in 24 hours and Holds 29 large or 237 small tablets * Treats 80,000 to 322,000 gallons * Measures 10-1/4-inch length by 40-inch height by 10-1/4-inch width