Planted Tank Enthusiast
Join Date: Feb 2013
Location: Jacksonville, Florida
In my experience, Green Spot Algae is caused by insufficient phosphates.
Also, more lighting may mean you will need to run CO2. If the plants are growing well right now and you're happy with their progress, I wouldn't change it.
Watts per Gallon is an old method of measuring light output. It only applies to incandescent lamps.
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It's CO2. See-Oh-Two. Not C02 (see-zero-two).