Okay, so I was testing around with my nitrate kit, tested the tank, it was about 40PPM, so I did a water change. But as I was doing this, I figured lets check the tap water. So I did, and it comes out that my tap water has about 5-10PPM nitrate in it already. Shouldn't it be 0PPM? Is this normal for tap water?
I'm not concerned about this, just wondering if its normal or not?
What have been your results with testing tap water? if any..
Thanks.



