Less main filter change necessary.

Less main filter change necessary.

Eheim 4004320 prefilter for external filters and powerhead Eheim Aquaball (Misc.)
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Customer Review

With the pre-filter, the main filter has a much longer service life. The pre-filter is quickly cleaned times. Less well resolved is the locking of the prefilter. One need both hands. A simple screw (half a revolution) would be more practical. What "and powerhead Eheim Aquaball" shall mean remained a mystery to me. Such a part I could not find !?

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