Sheet Matala Green
The Green Matala traps medium size particles and can be clean out very easily by simply shaking the pieces out before draining the sump. You may use the garden hose to spray clean them. The dirt falls off very easily.
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.
Green Matala is available in full sheets, 48" x 39" x 1.5" or half sheets, 24" x 39" x 1.5".