Scientific Configuration,Rational Combination : Bio-Balls do not require replacement unless damaged or destroyed ,Use scientific method,reasonable filter material,the filter media works better. Resolve Impurities,Stabilize PH : Resolve impurities,clarify your water naturally and these bio-balls. Balance pH value of fish tank,help to purify water,decompose harmful substances, adsorb impurities,providing healthy water for fish to thrive. Hollow in the Filter Material : There is a hollow in the middle of the biological column filtering medium, can provide an anaerobic environment, reducing the content of nitrates in water, and promote more healthy water quality. great for any freshwater or saltwater fish tank or mini-reef aquarium.Easy to wash and clean. Work as a Biological Filter Media : Aquarium bio filter is excellent interaction between air and water and gas exchange. They will also promote gas exchange and increase dissolved oxygen levels. So as to form a good ecological cycle.
