Hey I am thinking about setting up a 12 like this and found this thread on google and had to make an account to ask some questions. First of all, your tank is amazing! I was wondering what you have your par bulbs clipped on to. It looks like some black wall but I don't think it's the back of your tank. Also, how do u like the overflow? I was considering the same one. Also, could u explain ur plumbing a bit. I have never had a sump so looking for a little guidance. I see that the water goes into the overflow, down into the sump then looks like it comes back up into the other side of your tank through your black barrier thing? A little explanation would be nice. Thanks!