The idea of the Japanese matting is that the water flows up between the sheets with no restriction and the bacteria attaches itself to the sides of the matting. It is not intended for the water to flow through the matting as this would act as a mechanical filter and soon choke up.
The matting cartridge should be as deep as possible. It will in the end depend on how many strips you will be able to cut out of one sheet to save on cost. The normal depth is 8, 10, or 12 inches.
Posted on Aug 22, 2005, 11:21 AM from IP address 86.128.124.147