So i was thinking about getting a nano tank, or maybe even like a 25g reef. It would be my first saltwater tank ever, I heard the key things were usually to keep double the filtration for the size of the tank, so if i had like a 10g tank, have something for 20+ gallon filtration. Also the lights for the reef are key. Do they have to stay on all day and night? I just want to hear what some of you guys have done with nano reefs and get some tips, and what not to do's.