Swimming pool sand filter for low-maintenance
In order to keep the water clean and clear, Aquatica has opted to install a multi-bed swimming pool sand filtration system in the Fusion, Zen and Rest indoor/outdoor spas. Mechanical cleaning takes place via the sand filter, which filters out particles down to about 25 µm (thousandths of a millimeter). The Aquatica central spa controller and valve on the filter tank controls the water flow through the filter. The filter is 2/3 filled with filter sand, grain size 0.6-0.8 mm. As the dirt accumulates in the filter, the backpressure increases and is read off electronically in the central spa controller, which then initiates a backwash of the sand filter.