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Thread: Nitrates...
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Old 07-14-2013, 06:25 PM   #7
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Join Date: Apr 2009
Location: Redmond, WA
Posts: 239

Probably need a bit more information about your setup, but a couple things come to mind.

- If you did a 50% water change yesterday, and your readings are still that high, chances are you were well over the 160 reading on the scale.

- I would probably continue with daily 20% water changes until you start to get the concentration under control.

Other thoughts:
- What filter do you have on this tank? Is it possible that the filter is undersized for the tank setup that you have?

- What types of plants do you have in this tank? Some are better than others at sucking up nitrates. Floaters come to mind, hornwort, etc.

- Any chance that your test kit is expired, or at least those used for the nitrate testing? I am guessing you probably have API kit - the newer ones show the expiration date on the bottle. I just ran into this yesterday where my GH kit was woefully expired. I couldn't figure out why it wasn't reading reliably, and then noticed how old it was. I swear it was expired when I bought it at the store because it was 2.5 years out of date.
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