I run two lights because the marine land is abysmal (worse than a light that comes with a kit) and the other light is to grow plants, it doesnt reach the front so I use the marine land (I may as well, I spent $60 its not like im going to not use it) to illuminate the front. I dont dose fertilizers besides root tabs, and being real I dont do water changes unless my ammonia or nitrites are elevated (but I do test weekly).