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Discussion Starter #1
Its probably silly, but I'm wondering if the white fine filter pad holds much bneficial bacteria? I bought some replacements since my current one is falling apart; do you all think it would be fine to replace it or should I run the filter with both for a bit? I'd imagine most of the biological filtration is in the filter balls/ tubes or whatever they are. :p
 

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It should be fine to replace. The white filter pads are for mechanical filtration. There will be some bb on it but most will be in your bioballs.
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Discussion Starter #3
That's what I figured :) thanks!
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I change mine sometimes in the eheims. Those bioballs are packed with more bb then the average biological media.. Youre safe.
 

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Most biomedias are marketing ploys more then anything. Irregardless you can usually change 1/3 media in a filter safely provided you don't disturb the bioload too much. Quilt batting is good for fine filtration. Its also cheap which is why its the only thing in my eheim.
 
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