02-03-2013, 11:04 PM
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Welcome to TFK!
Yes, nitrates are a real pain and when high in the source water require a two prone approach. 1) to reduce source water nitrates; and 2) to keep tank nitrates low.
I am not familiar with the inline Aquaworld Nitrate Remover product (I don't think it's available here in the states) but think it's worth a try. It most likely contains a synthetic resin that adsorbs nitrates. This is similar to Fluval Lab Series Nitrate Remover and API Nitra-Zorb, although these products are intended to be used in a filter in an aquarium (or in a filter in a tank to create water for water changes). All of these products are rechargeable in salt water.
I have also used an API Tap Water filter to create deionized water that I have mixed with my filtered water.
I tried using rain water but had a bad experience (acid rain) so don't recommend it.
I am also now collecting water from my basement dehumidifier.
You could invest in an RO or RO/DI unit, but it can be involved unless you have high water pressure (otherwise you'll need a pump to create the required pressure to force water through the membrane) and you will lose about 4 gallons of water for every 1 gallon of RO water produced.
Note that RO, DI type waters contain no minerals and must be adjusted before using. I tend to mix these type waters 50/50 with tap water and use Seachem Fresh Trace and or Seachem Replensih for nutrients.
- As for nitrates in the tank, sadly my DIY de-nitrate filter was not successful in culturing the necessary anaerobic bacteria. I'm now using the Matrix/De*Nitrate product mix alone in an Aquaclear 70 filter as a dedicated bio-filter.
- Use plants, even floating plants as they will help - I'm using Anacharis. You will find that plants will process ammonia and even nitrates. A heavily planted tank would be best, but may require different lighting. Floating plants work in almost any tank with 6500k bulbs.
- Keep the tank/filter fairly clean as this reduces organic matter that decomposes producing nitrates. I always had lots of detritus come out when I gravel siphoned so I switched to sand (where everything stays on top).
- Cleanup crew. Soon after switching to sand, I added a couple of Pepper Cory's. They ensure there's never any uneaten food on the bottom. You might choose some other bottom feeders to assist. (Frankly I just love these little Corys and how they dimple the sand as they forage for food.
- I'm using Seachem Purigen (2x 100ml pkgs) in my filters. Purigen is a synthetic resin that adsorbs dissolved organic compounds (DOCs) before they decompose to produce nitrates. Purigen can be regenerated in a 50/50 mix of chlorine bleach and water followed by dechlorination before reuse.
Last, and some may argue, you may find that treatments to resolve your source water nitrates do not come cheap or without labor. Through excellent filtration, tank maintenance, lots of floating plants, I have successfully reduced the volume of the weekly water change. This requires judgement and experimentation.
I hope some of these ideas help - but go ahead and give the Aquaworld product a try and see what happens - it should work. My only reservation is knowing when the cartridge is exhausted so you can regenerate it in SW, but you will learn.
Regards and keep us posted.
Last edited by AbbeysDad; 02-22-2013 at 12:02 PM..