Blue Horizons Ultimate Multifunctional Floating Dispenser 720g is an ultimate chlorine dispenser is perfect for small above ground pools. Specifically recommended for swimming pools up to 5,000 gallons (22,700 litres). As an example a 12ft round pool that is 30 inches deep has a water capacity of 1183 gallons (5377 litres). The dispenser comes fully loaded with Chlorine, so there is no need to touch any chemicals in the process, simply place into your swimming pool and let the dispenser do the work! The dispenser is adjustable, to allow for approriate chemical distribution in your swimming pool. Comes loaded with: - Sanitiser (Chlorine), to keep the water disinfected from bacteria. - Clarifier, to keep the water sparkling clean and improve water clarity. - Algaecide, to prevent algae in the long term, alongside the sanitiser. - Sun Stabiliser, to protect sanitiser (chlorine) levels from the sun. Feactures - Fully Loaded Floating Chlorine Dispenser 720g for Swimming Pools