The Marineland Penguin Reverse Flow Kit easily adapts any Penguin Power head to a versatile power sponge filtration unit in a matter of minutes. It can be used to create unique waterfall effects and it's perfect for converting to super efficient reverse flow under-gravel filtration.
This kit includes: 6" black pre-filter sponge, pre-filter core and adapter, 1/2" straight barbed adapter, reverse flow elbow that fits between 3/4"-1 1/8" under-gravel filter lift tubes, and an air inlet plug.