aquarium bio ball,filter ball, filter material,sponge inside bio-ball
1 bio ball,filter media
FILTERING PRINCIPLE OF BIO-BALL
This is a super bio-ball with sponge inside,it can not only provides the maximum surface area for nitrifying bacteria growing,but also promotes gas exchange and upgrade oxygen level.It is save for freshwater and saltwater aquarium.
!)different size of bio ball, pure bio ball and sponge inside bio ball
2)large area for the growth of nitrobacteria
2.we have other different size of bio ball:32mm,42mm,48mm,26mm,36mm,46mm,56mm,76mm