Water testing assistance

N

Nadzo

Joined
9 Nov 2011
Posts
178
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Location
Vryburg
Could you guys please help me out. I have a seachem marine basic test kit which I bought last year. The kit cannot be over 9 months old. It doesn't have an expiry date on it anywhere. Do they expire?

Also, I am having trouble with the nitrate/nitrite tests. I did a reference test and all is good.
But when I test my tank water the color doesn't change. It stays yellow (color of reagent). Does this mean there is no nitrite or nitrate?

I have attached some pics showing the color

IMG_5096.JPG


IMG_5098.JPG
 
Sorry the pink is the reference test.
The first picture is the nitrite test (left yellow). The second picture is the nitrate test (left yellow).

I do not have anyone else in my town that could help me (no1 that I know of)

I'm just a bit uncertain because I have a very low alkalinity figure with this test kit and I'm not sure if it's accurate.

Also, I have tested water on 2 tanks giving me the same outcome.

1st tank is in cycling for over a week.
2nd tank has been running for 9 months
 
Thanks for the quick response. I'm pretty sure this test worked perfectly just when opened?
I haven't tested in a while
 
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