The compact Boyu YT-6000 Pond Bio Filter is a highly effective complete biological box filtration system, perfect for small/medium-sized garden ponds up to 4500L volume. Supplied with a 2000L/H pond pump and connective hosing, the YT-9000 is ready to install. Each YT-9000 is fitted with an 11W UV clarifying lamp to help rid water of harmful bacteria, ensuring a crystal clear pond. The multi-layer filtration layout allows water to biologically filter upward through layers of sponge, returning clean through a top outlet. Each unit is complete with fine and medium foams integrated into a simple-to-use pull-up handle cleaning system. Durable and long-lasting, Boyu pond and aquarium products are manufactured using the highest quality plastics. Making use of the latest technology and design, the Boyu YT Garden Bio-Filter range is easy to install and maintain. Used to purify water in small/medium-sized ponds lightly stocked with goldfish and koi fish, these heavy-duty bio-filters are ideal for amateur fish keepers and professionals alike. Built-in UV steriliser, high volume capacity multi-stage foam filtration. Complete with a pond pump and adaptors 3m flexible hose included (20mm), 2x hose clips supplied.