With the OASE underwater filters you can create a water paradise even where space is at a minimum. Clear and healthy water ensures undisturbed pond enjoyment. But what happens when suspended algae or other substances that cause turbidity turn the water green and lessen the enjoyment of the garden pond? There is a remedy. Simply place the UVC clarifier in the water circuit; ideally upstream of your filter. The special light radiation in the interior of the clarifier kills off the algae and bacteria and germs are eliminated. For connection, all you need is a power outlet and a suitable flow-through filter or module filter system.