The Planted Tank Forum - View Single Post - weak plants
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post #6 of (permalink) Old 10-11-2006, 09:45 PM Thread Starter
Algae Grower
Join Date: Aug 2006
Location: stl, mo
Posts: 67
Yeah.. I was thinking potassium,it is the other big one, but wasn't sure.. In terrestrial plants, a lack of potassium causes the leaf veins to turn really yellow, while the rest of the leaf is still dark green. This is sort of even yellow. Actually, the veins are slightly darker green on mine...
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