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Is a second light required


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I'm new to planted tanks and I'm grateful I found this COOP.  The videos have been priceless.  

My questions is, will I need more than one light for my tank.  I'm sticking with low light plants and I have a Fluval 3.0.  The tank is fairly deep.  With substrate it will range between 22" and 18" deep.  I don't plan on running Co2.  The full dimension are 30"x19"x24".  Someone recommended two lights at that depth. 


Thanks in advance.

Edited by BBQRacer
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