I also use biological microbes and bio balls.
Japanese filter mat review.
Uniquely versatile matala filter mats are easy to work with and can fit most all filtration needs.
Used for prefiltering mechanical filter media biological filtration spawning mat plant protection and as a support for other filter medias.
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I am using it cut in to 24 pieces in my biofilter barrels on my 3000 gallon koi pond.
Kyuemon a tiny brand of housewares owned by the japanese company kubota minoru ceramics ltd has for decades been quietly making an entirely different sort of pourover filter composed of a unique porous ceramic material that looks and feels like charcoal.
This traps particles and muck which facilitates clear water.
Matala filter media is a progressive filter material that is self supporting and multifunctional.
This is a rigid filter media very easy to handle cut and rinse.
Kockney koi jap matting has excellent bio mass retention due to its coarse nature it and its open texture removes larger particles from the water.