Suitable for ponds ranging from 18,000 litres goldfish to 9,000 litres koiat last, a genuine multi chamber professional filter box that anyone can afford. The multichamber flow through pond filters offer the features found on similar products but at a reduced price! This set pairs the pondxpert multichamber 18000 filter with the greenstop pro 36w uvc. easy maintenance simply lift the lid and pull out the foams by the handles. The foams can then be squeezed clean.sludge outlet this filter comes complete with an integrated sludge outlet on each chamber, which can be used to remove sludge from the base of the filter or do a back flush!high quality filtration the multichamber systems include both coarse and fine foam filtration along with a layer of japanese matting at the bottom of each chamber.built in thermometer a handy, replaceable thermometer is attached to the lid, giving you an accurate reading of the pond’s temperature.uvc included the uvc included is a powerful 36w uvc with a built in turbulator and thermal protection. The turbulator increases the waters exposure to the uvc and the thermal protection offers valuable protection should the unit get close to overheating.uvc bulb included.flow adjuster the greenstop pro units include a flow adjuster that can be installed into the unit, giving you control over your flow rate.this set contains the following components please click links below for more information br • pondxpert multichamber 18000 br • greenstop pro 36w br