too much light, not enough C02?

[gmac]

I have two 96 watt pc's over my 55 gal tall, no CO2 additions. Plants are almost all covered in brownish algae, except for the leaves covered by other leaves. Those look the best, nice and green and healthy. Lights are 10000k and 6700k. Is this too much for no CO2 injection? I was trying to keep the whole thing very simple. could I just get rid of one of the lights? Thanks

[brookline45]

That is alot of light for no co2. Typically over 2wpg you need to start looking into co2. You probably want to try one bulb for a while. co2 wouldn't be a bad thing even with one bulb.