Over time filter media can get so badly sludged up that it is worth thinking about starting afresh.
If a filter has been removed from a pond system for some time then the bacteria will die, which is also a time to consider replacing the media.
Can also be used if constructing your own DIY filter.
Massive 1/4 cubic metre bag which is enough to fill a large koi filter bay
Flocor media is multi-surfaced meaning friendly bacteria can easily colonise it and thrive
Used successfully for many years
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