We use electrically powered mechanical systems to circulate the water and to biological filtration and Ultra Violet bulbs to clean it.
All equipment in the water like submersed pumps, skimmers, any additional aeration specified and under water spotlights are run from 12v for safety
The filtration units and UV bulbs sit outside the water so they can be accessed for cleaning. These are connected directly in to the mains power supply with armoured cable and a waterproof outdoor double socket.
2 phase power is needed, although 3 phase power is desirable is not essential. We are often asked if the equipment can be powered by solar panels. Currently it is not possible to use purely solar, too much power is needed to circulate large volumes of water although filtration companies are developing new products.