FilterBall ACTIVE is a high-performance filter medium for biological filtering. Ideal for retrofitting of existing biological filter systems. Used in pre-clarified filter stage or as a flint filter. They require less space to locate the necessary bacteria and at the same time achieve a very high degree of efficiency. If the FilterBall ACTIVE (Bioballs) needs to be cleaned later, do not rinse it with tap water, but with pond water. Tap water would interfere with the biological balance. Also, never use cleaning agents for later cleaning. This may lead to the death of microorganisms.Specific surface approx. 350 m² per 1,000 liter FilterBall ACTIVE.
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