hydor_italy
Member
BLUBALLS The efficiency of a biological filter depends on the bacterial substrate we use. That's why we created BlueBalls, spheres made of high-surface plastic. The larger the surface, the more bacteria can colonise them. That's why our filters are the best on the market, because we only use the best possible materials for the well-being of our aquatic environments.
For freshwater and marine aquarium High water flow and high porosity Biological filtering and balance
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More informations here: Bluballs