The Planted Tank Forum - View Single Post - LED Lighting for Low Tech 125 Gallon
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post #6 of (permalink) Old 02-02-2013, 05:57 AM
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Join Date: Dec 2005
Location: Sacramento, CA
Posts: 19,680
It is going to be difficult to use that much light without also using CO2. From my experience you need to have less than about 30 micromols of PAR to do without CO2 without also getting lots of BBA problems. This is assuming the light is right at the top of the tank. If you raised those Finnex lights to about 6-8 inches above the top of the tank you should get a low enough PAR.

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