Pentair R171096 -In-Line Chlorine/Bromine FeederThe Pentair R171096 In Line Chlorine Bromine Feeder #320 is an easy handling and efficient automatic chemical feeder that will provide proper chlorine or bromine distribution to your pool water. It will make the most of your slow dissolving tablets, and it can treat from 6,000 to 47,000 gallons of water. This feeder does not allow any fumes to escape from the unit as it is completely enclosed, and does not require any special venting. Use this