I started my 40 in July and had just about emptied this tank except for some sand, live rock, GSP , and Anthelia with just a basic grow bulb over it since August. I took all of the sand out and replaced it with black sand and replaced all of the love rock about a month ago. I started adding corals in 2 weeks after starting it this time around but pulled them all out and waited two more weeks because the corals aren't happy. I really just started putting the corals in this past weekend. I have decided I am going to pull them all back out though and put them in my 40 and get some nems going. I will leave some softies in to help with nutrient export.