The Planted Tank Forum - View Single Post - Biological Filtration Survey
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post #8 of (permalink) Old 10-21-2020, 05:58 PM
billb
Planted Tank Obsessed
 
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Join Date: May 2009
Location: San Diego, CA
Posts: 347
The Nuclear filter cartridge has a pretty sizable central cavity. I suspect you already know this and were planning to use this for a large bag of carbon or Purigen. You could instead use the space to have two media bags. One with carbon or Purigen, and one with a biomedia like Seachem Matrix. Might be usefull if you want to max out the rainbow herd!

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