I'm with you Tony on the probe. Keith brought his over and tested my water and it was out of this world!!! I don't even bother with testing the water anymore, it is just frustrating. My fish let me know when they need a water change, but now that the tank is a year old we don;t have any issues at all... touch wood.
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Originally Posted by Delphinus
What do you measure it with? Next time I come over I'd like to bring my NO3 probe and we can try some measurements with it. Reason I say that is I find it's a bit startling how differently my probe reads a nitrate level than what my test kits read out at. For example, I get about 5ppm NO3 readings using both Elos and Salifert .. which suggested to me that maybe my NO3 was around 5ppm, but when I use the probe it tells a much different story (30ppm).
So I'm not disputing your 5ppm, it may well be that, but I'm just curious what readings I'd get on different water.
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