Ian William Danne

Certikin International Ltd. manufactures and distributes pool equipment. It offers pool fittings, light, sound, pumps, filters, pipes and fittings, heating and ventilation. The firm provides spa and sauna. The company was founded in 1963 and is headquartered in Witney, the United Kingdom.

Part of Fluidra SA, Astralpool UK Ltd. is a company that offers a wide range of products for water disinfection in swimming pools. The company is based in Fareham, UK. Diatomaceous filters are one of their products, which work similarly to cartridge filters but with the addition of diatoms, fossilized elements that act as filtering agents with a high filtering capacity. Diatoms absorb dirt, even in some cases invisible to the human eye, with a filtration capacity of around 10 microns.