From my experience so far from a marketing standpoint, the majority of members find us via Google searches for information. When we answer questions about LED lighting, tank crashes, ID's for "what the heck is this thing in my tank?!?!?!," that's when we attract members.
I don't know if you've noticed, but there are new members saying "hi" in the Meet and Greet forum every day! In the past few weeks, we are averaging about 25% more people online (during the peak hours) than before (users online in the mid 400's to now in the mid 500's on a daily basis). Trust me, we're monitoring and watching the numbers. Too fast a growth, and it can become overwhelming. I would say the pacing is really good right now.
Random trivia info: Did you know that nanoreefing4fun has personally welcomed every single new member to the site? That's amazing!