The Planted Tank Forum - View Single Post - Is there freshwater tests for iron, magnesium, and calcium?
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post #7 of (permalink) Old 12-25-2012, 01:27 AM
Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Posts: 11,647
If you ever feel something is deficient, add more, a very simple solution to rule out such possibilities. Wait 1-3 weeks etc. If nothing improves, then you know it's something else.
This is surely the easiest test.
If adding a potential cure does not cure the problem, then the problem is something else.

It sure worked for my tanks.
The problem looked like potassium deficiency, so I dosed K. The problem went away. It comes back when I slack off dosing K.
The plants are the best test.
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