This pond filter is essnetial for ensuring that you have healthy fish and plants. The Oase Filtral 1500 Pond Filter is the next generation of internal pond filters for wildlife pond of up to 1500l and Goldfish ponds of up to 700l. These fully redesigned filters include an integrated pump, filter and UVC and can be completely hidden in a pond. This efficient and integrated pond filter provides clear and healthy water, are easy to install and have a choice of outflow connections. Small in size but large in features, these complete filter units incorporate both medium and fine grade foam for mechanical filtration, which is followed by ceramic and plastic media for biological filtration. The top quality construction and easy to open clips mean cleaning and maintenance of this product is quick and simple, and the inclusion of a simple UV indicator is a reassuring confirmation of the functioning of the UV light.