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- From: cowan@cerianthus.pinetree.org (Darin Cowan)
- Newsgroups: rec.aquaria
- Subject: Re: High nitrates [M][FILTRATION]
- Message-ID: <o4w5VB7w165w@cerianthus.pinetree.org>
- Date: Mon, 21 Dec 92 13:38:59 GMT
- References: <230@trident.datasys.swri.edu>
- Organization: The Aquarium, Ottawa, Ontario
- Lines: 32
-
- mark@trident.datasys.swri.edu (Mark D. Collier) writes:
-
- > Are there any other ways to deal with high nitrates? I have
- > read about denitrifying filters, but none of the local shops
- > use them. Does anyone have experience with either a commercial
- > or DIY denitrifying filter?
- >
-
- You don't say what kind of filter you have, but I'll pass on the wisdom of
- my dealer. I just went through a high nitrate problem (80-100 ppm in my
- 30 gallon).
-
- First, change as much of the water as you can. Changing 20% only reduces the
- nitrate by 20%. Change 99% if you can.
-
- If you have a trickle filter, buy a big sponge and sit it in the bottom. This
- will foster the growth of de-nitrifying anaerobic bacteria. The sponge
- media for an Aquaclear 2000 is good. Leave it in there basically forever. It
- should become encrusted with gunk and generally look yucky.
-
- If you have power filters like Aquaclears or Skilters, buy some denitrifying
- chips and add them to the filter. They last a LONG time and aren't super
- expensive.
-
- It was suggested that I run my protein skimmer all the time as that also helps
- reduce nitrates by bubbling out rotting organics.
-
- My nitrate level has gone from over 100 ppm to below 20 and is still falling.
-
-
- Darin Cowan - cowan@cerianthus.pinetree.org
-
-