Bio Balls 32mm x 100 balls

100 Bio Balls which is roughly around 2.5L worth.

Each approximately 32mm in diameter.

Bio Balls are black plastic balls specially designed to provide lots of surfaces within the area they occupy.

Bio Balls are used for biological filtration. The main advantage of bio balls over other biological media is that the surfaces are impossible to clog up (when used with a prefilter)

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