The Kockney Koi Adjustable Undergravel Filters provide simple and effective biological and mechanical filtration. These Adjustable Undergravel Filters have been designed to fit a wide range of tank shapes and sizes. The Undergravel filters come supplied with telescopic uplift tubes with height adjustment from 30 to 50cm which can be freely rotated by 360. The filters require an air pump or suitable powerhead for operation. How to Install Kockney Koi Adjustable Undergravel Filters? The Kockney Koi Undergravel Filters are supplied as individual elements, each measuring 14cm x 7cm which can be configured and arranged like lego blocks to suit different tank shapes and sizes. After laying, you can cut off excess block connectors to obtain exact dimensions. Individual blocks can also be connected perpendicularly to each other. Kockney Koi Adjustable Undergravel Filters Sizes: - 18” x 12” - Consists of 3 x grids / 1 x outlet pipe / 1 x air stone with airline - 23” x 12” - Consists of 4 x grids / 1 x outlet pipe / 1 x air stone with airline - 28” x 12” - Consists of 5 x grids / 1 x outlet pipe / 1 x air stone with airline - 34” x 12” - Consists of 6 x grids / 2 x outlet pipes / 2 x air stones with airline - 39” x 12” - Consists of 7 x grids / 2 x outlet pipes / 2 x air stones with airline - 47” x 12” - Consists of 8 x grids / 2 x outlet pipes / 2 x air stones with airline Simple and effective undergravel filters Provides both biological and mechanical filtration Lego block format for varied aquarium installation Supplied with rotating, telescopic uplift tube Requires a suitable air pump or powerhead to operate Easy to install Available in a range of sizes
