Pop up pool floater is a Pre-filled Chlorine dispenser which is ideal for smaller hot tubs and inflatable pools. For perfect, safe water simply place into your hot tub or small pool. A Convenient 2 – 4 week treatment that provides slow, consistent chlorine release and controls bacteria & algae growth. Even chemical distribution. No handling of chemicals and is sun stabilised (pool relevant). Each float dispenser is ideal for hot tubs and pools up to 500 gallons (3270 litres).