The new hozelock ecoclear 3000 filtration system is a combined package including the new aquaforce 2500 pump and a bioforce 3000 uvcfilterr bioforce 3000 uvc the bioforce filters are a closed pressure system holding more bacteria than a similar size normal filter small enough to hide near the pond when it is buried up to its lid this model also contains an ultra violet clarifierr aquaforce 2500 the new aquaforce is the recommended pump for pumping water to the bioforce filter and in add