100Pcs Aquarium Fish Tank Koi Pond Plastic Biochemical Filter Media For Fish Tank Sump Koi Pond Aquaponics Aquaculture Hydroponics Diameter 25Mm, White

Name: MBBR fluidized bed packing Material: PP polypropylene Features: easy to hang film no clogging Design: The outer periphery of the outer surface is toothed and there are three layers of circles from the center to the outer circle. Diameter: 25mm/0.98in Length: 10~12mm/0.39~0.47in Thickness: around 0.6~0.8mm/0.2~0.3in Middle circle: 0.4~0.5mm Out-of-round rate: no more than 20% Tooth depth: no more than 1mm/0.04in Product use: industrial reaction tower filling industrial desulfurization and denitrification purification and dust removal and household fish tank filtration.