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post #2 of (permalink) Old 11-09-2012, 01:57 AM
Planted Member
Join Date: Jul 2012
Location: Los Angeles, CA
Posts: 214
15 watts in a 6.6 gallon tank (assuming it's <12" tall) should be plenty to sustain most mosses and grasses. Just be diligent about monitoring your algae levels since medium to high light without CO2 can easily lead to algae outbreaks.
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