Undergravel Filter Kit Aquarium Fish Tank Under Gravel Tray - Multiple Sizes (24 Piece) by Amazon.co.uk

• Undergravel filter trays are a proven efficient biological and mechanical filter. These interconnecting pieces are ideal for covering all sizes of aquariums. Multiple sets can be used and interlinked for larger aquariums.

• Our undergravel filters are available in 3 sizes – 24 Piece, 28 Piece and 32 Piece. Please select the required size from the drop down menu when ordering. Please see detailed specification for each model below.

• The uplift tube supplied with each model is adjustable in height between 32cm and 51cm height.

• The gaps in this filter are 2mm, therefore, these filters will only work well with gravel larger than 2mm. These cannot be used with a sand substrate.

• Please note – a suitable air pump or water pump is required to run the undergravel filter (not supplied).