Oase Biosmart 24 filter, 24w UVC and pump. Perfect working order and cleaned out only with pond water to preserve the bacteria. Everything works properly, new UVC bulb fitted a few days ago. All sponges in good condition. Selling because I've just upgraded. I had this running on a 15,000 litre pond, but heavily stocked, hence the upgrade. All will be shown working before purchase. Cost new, just under £600