This is the Beachcomber's Floating Disc dispenser, for use with bromine or chlorine discs. NOTE: Never mix two discs together.
Instructions: Simply unscrew (counter clockwise) the bottom barrel, load discs, screw barrel back on, tighten locking nut. Adjust the barrel so it's barely open (2-3 open slots) then adjust accordingly. The larger the opening the more chlorine/bromine will be dispensed.