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How to control test nitrate?


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  • Regular Member

What is a great source of nitrate to test if your API freshwater master test kit nitrate test is working?

 

I recently finally got a new test kit again (expiration date late 2018) and every singe tank I test, shows 0ppm nitrate. Yes, I do follow the instructions although I am well familiar with them after nearly a decade.  I do a hella maintenance but 0ppm all across the boards seems a bit too good to me.

 

I wonder if there is something wrong with the test, so I would like to test something that definitely should have some nitrate reading in it? What would be a good source for this?

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  • Regular Member

You could get some potassium nitrate. It is sold in hardware stores in the garden section to decompose stumps. It is also sold as aquarium plant supplement but that'd probably be more expensive. As a gross test you could probably just use little all purpose garden fertilizer as their N is usually a mix of nitrate > ammonium.

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