Shrimp Under Gravel Filter Box

The Asian style Undergravel Filter Box is a unique way to filter your shrimp tank. It works by pulling water slowly through the media to the bottom of the box and pushing it out the tube at the top.  

This allows for a large amount of media to be used, and due to the water slowly passing through it ensure that the media or soil always stays oxygenated and that no dead spots occur.