The Planted Tank Forum - View Single Post - How to tell deficiency
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Old 01-29-2013, 01:30 PM   #4
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The same company that makes your Nitrate test kit makes a Phosphate test kit. Buy it, make a reference solution to test the accuracy of your test kit and then have at it. If you search the forum you will find posts on how to make a reference solution. You will need a scale though.

Originally Posted by Colorblizzle View Post
I have a nitrate kit but I've never seen a phosphate kit
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