Hi,
I have a Nano tank which is 12gal. I'm new to reef, basically I'm a newbie! in Reef. So I was Wondering How long should I leave the light on?
Do I haveto leave it on 27seven? right now I leave only 12 hours, :soda: is that too much? 
I have a Nano tank which is 12gal. I'm new to reef, basically I'm a newbie! in Reef. So I was Wondering How long should I leave the light on?