high quality far infrared bacteria house for koi pond filter

Specifications
Filter medium ceramic bio ring
1) quality goods and various packing
2) Eco-friendly .no polluted
3) Highly porous
Application: Ceramic ring/aquarium filter
1.Used in rearing pond as a filter
2.provided with high filter character
filter medium consisting of porous ceramic pipes suitable for use in freshwater and saltwater aquariums.
*Double features filter medium, can be used as a mechanical prefilter medium for coarse particles or as a biological filter medium. As prefilter medium, protects the biological filter material from rapid silting.
*The hollow structure provides ideal conditions for beneficial bacteria, whilst at the same time allowing excellent rates of water-turnover.
*Highly efficient surface for beneficial bacteria to colonize.
package:25kg/bag
gross weight:25.5kgs
net weight:25kgs
package size:63*38*18