Pentair - Rainbow - Automatic Chlorine / Bromine Feeder - 300-29x Commercial and High Capacity Feeder - R171070 $268.19 Rainbow - Automatic Chlorine / Bromine Feeder - 300-29x Commercial and High Capacity Feeder - R171070 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... Add to Cart