Bio Balls 26mm x 40 balls

40 Bio Balls which is just over 500ml worth.

Each ball is approximately 26mm 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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