"LeighMo" wrote in message
...
I started out with 130 watts over my 75 gallon tank, and it was enough for
just
about everything except Lilaeopsis. If you want to grow that, you need a
ton
of light.

One problem I ran into, and the reason I eventually put more light over
the
tank, was that one light strip is kind of narrow for a 75 gallon tank.


If I add another 110 watt strip to the tank, that will bring the total watts
up to 220, almost 3 watts per gallon. With that much light will I need to
use CO2 on the tank?