Initial treatment: in an empty pool, apply product neat onto the walls and bottom of the pool. If the pool is filled, pour product directly into the pool. Dosing: 30-50 ml per m3 of water. Maintenance treatment: pour product into the pool, 20-30 ml per m3 of water every week. Shock treatment: pour product into the pool, 50-70 ml per m3 of water in addition to chlorine shock treatment to raise free chlorine level to 5 ppm. Only perform treatment when bathers are not present in the pool.