- Kent Marine Nitrogen Sponge for Aquariums, 7-Pound
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Amazon
From $21.38 (New)
From $21.38 (New)
| Latest | $21.38 Apr 21, '16 |
| Highest | $27.50 Jun 17, '15 |
| Lowest | $19.84 May 2, '15 |
| Average | $21.38 (30d avg) $23.41 (90d avg) $22.55 (180d avg) $22.20 (365d avg) $22.14 (Lifetime average) |
| Added | Feb 13, 2015 |
| Latest | $14.49 Apr 21, '16 |
| Highest | $15.99 Sep 9, '15 |
| Lowest | $13.49 Jun 20, '15 |
| Average | $14.49 (30d avg) $14.49 (90d avg) $14.49 (180d avg) $14.24 (365d avg) $14.12 (Lifetime average) |
| Added | Feb 13, 2015 |
30 day average: 60,351
90 day average: 64,270
Kent nitrate sponge is a granular zeolitic medium which works by two methods. It slowly directly adsorbs small amounts of ammonia that are released by fish and natural processes and it fosters anaerobic bacterial DE nitrification due to its physical porous structure. This DE nitrification slowly reduces nitrate levels in the aquarium. It works well in freshwater tanks or tap water to remove toxic ammonia directly. Nitrate sponge prolongs the time allowed between water changes by keeping nitrates low.