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Re: Aquatic Plants Digest V3 #823

>I have two Amazon sword plants, which are turning yellow. Other plants in 
>the tank are doing fine. The fern is dark green, Monywort is also green. I 
>don not understand why the Amazon Sword plant is turning yellow. Please 
>Following are the specifications for the plant

I had the same problem, it's the older leaves on the sword that are 
turning yellow. Right?  If this is indeed the case, you have a nitrogen 
deficincy and should start dosing your tank with posassium nitrate.  Once 
you start dosing you will see a BIG difference. Hope this helps.