- Reaction score
- 5 to 10 years
It wasn't actually that high, though. My older API Master Kit was showing it that high, but two different kinds/brands of test strips were showing it as trace amounts. And a brand-new API Master Kit agreed with the test strips.FishRFriendz said:
May look a little off since the test tubes are laying on an off-white stone; but the tap water (right-hand tube, second pic) was showing 5ppm or less with the brand-new API Master kit (agreeing with the test strips), while the exact same tap water sample was showing nearly 40ppm with the older Master Kit.
And that was my point, that the exact same water was only testing that high with an older Master Kit, one that was still well within its expiration date (but also had been stored in a non-climate-controlled space.) My actual nitrates were nowhere near as high as the older test kit was showing them to be, either in the pond or from my tap.
The test strips may not be as accurate as a kit, but at the same time the kits aren't infallible either. It took me two kits and two different types of strips to come to the conclusion that my older kit wasn't giving an accurate result (was reading way higher than actual.)