50 Pcs 18mm Diameter Black Bio Balls for Aquarium Pond Filter
Plastic bio ball filters are great for fish tank, to promote gas exchange and increase dissolved oxygen levels.
Great for tropical fish farms, koi ponds, waste water systems, cooling towers, and other commercial and industrial systems.
For use with wet/dry filters (here is not included), to improve biological filtration.
Package Content : 50 x Bio Balls
Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
Product Name : Bio Ball;Material : Plastic
Diameter (Approx.) : 18mm/ 0.7″
Color : Black
Weight : 75g