Swimming Pool Chlorinators and Chlorine Feeders make introducing a sanitizer into your pool or spas water simplistic. Just fill the chlorine feeder with chlorine tablets or sticks, and select a setting on the dial. Regulate the chemical feeder to the desired setting and allow the chemical reserve to be depleted before refilling. A reliable chemical feeder will limit your maintenance. The type of pool chemical feeder you use depends on the type and size of pool or spa you have.