Magnum 250g cylindrical sticks of 100% Trichloro-s-triazinetrione for controlling algae and bacteria in swimming pool water. Ideal for longer-lasting skimmer feed, some auto chlorinators and floaters in smaller water volumes. Also as a chlorine/stabilizer booster for salt chlorinated pools. Recommended as Step 3 of the Pure Wow Program for Guaranteed Algae-Free Results.
