API test help!

[rholguin]

I have both the sw test kit and the reef master test kit my question is i was testing my water today and tested the nitrate using the sw test kit that one read about 20ppm and then I used the reef master and that one read 0ppm. I did the test twice and the results were the same. What should I do? Any help is welcomed. All my fish and corals are doing great.

[Billybeau1]

Well, the only downfall of this brand IMO, is because of the type of reagent used, they can expire a little quicker than others.

Sometimes, when you buy the kits, they may sit on the shelf for awhile before sold.

They are pretty cheap, Less than 10 bucks. I would buy a single nitrate kit and see which one is closer. Usually when you buy the single kits as opposed to the kits, you stand a better chance of getting a fresh one.

Either way, I suspect the one reading zero is expired. :)