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"Water quality comes first and everything else follows."
With Purely Poret biofiltration media you will experience biological stability no matter how long it is between cleanings. Unlike other media whose efficiency goes down as the filter gunks up with bioloical matter.
The longer the biofilter squares are left alone the more efficient they become. Over time it will start to have an effect on Nitrate reduction. These squares are perfect for filling up the unused area around the return pumps in sump systems.
This media works best in conjunction with Poret mechanical filtration packages.