First off, if you're really concerned with parameters, ditch the 5 n 1 and use liquid reagents. One step further, you can calibrate a few of them to get more accurate readings, but just using liquid reagents alone is much better than strips even though they have their own shortcomings.
Strips can be notoriously inaccurate on a few tests, depending on brand, and they can foul or expire easily. There's no sense in going into this blindly. As Hoppy said, nitrite should be zero, your test could easily be off there, but if you indeed have 5ppm nitrite with a Betta in the tank, you have a serious problem, even if you only have 2ppm. In that case this tank would not yet be cycled, the equivalent of fish living in waste water. If nitrite is present, ammonia should be checked as well, and multiple water changes should be done until they are both at or close to zero, and repeated daily as they rise until the cycle is finished.
That said, nitrAtes at 10ppm suggests the tank is fully cycled, but ditch the strips if you're serious about your parameters. They're ok for quick reference when you're already familiar with your tank's chemistry, but not suitable for serious testing or dealing with possible emergencies.
As long as the nitrite result is an error, and there turns out to be no ammonia as well, I don't see that you need to do anything, I'm with Hoppy's opinion that your water is great for plants, mineral wise. That's about where I set my RO when I reconstitute the KH and GH.
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Last edited by jaidexl; 08-07-2009 at 03:40 AM.