For the DIY’er who wants to use mat filtration with good water flow. These are large 39.5″ x 24.5″ x 1.5″ plastic mats that can be used as they are or cut into whatever smaller size the hobbyist prefers. Traps large fish waste solids for removal and cleaning with a water hose.
A good biofilter needs a lot of surface area with open spaces between for good aerated water flow. A high surface area is useless if the passageways are so small that water flow cannot penetrate.
* If you prefer these to be cut smaller by us prior to shipping, please make a note in the customer notes and we will provide this service for you for free!