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Fluvall Filters and the media


chtaylor26
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Keep an eye on the flow, and see how it diminishes over time. When the flow is about half or less of 'clean', rinse the media in water from the tank when doing a water change (not new water) and simply put it back in - there's no need to replace the bio media or sponges. Carbon loses it's effectiveness after only 2-3 weeks, so unless you've got chemicals to remove, it's a waste of time (even then a couple big water changes are probably better for your system as a whole). The only time I use new sponges/bio media is after a few years when they begin to break down (and I've found a range of time for how long this takes - some 'batches' of foam seem to break down at different rates).

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