Pulsar® 30553 50 lb 68% Calcium Hypochlorite Briquettes Pail. High quality Pulsar® Briquettes are made exclusively for our feeders. The smaller briquettes create a well-packed bed of product. This allows the feeder to contact the entire bottom of the briquette bed evenly, not just the material resting on the grid, for consistent performance and a stable feed rate.​