I am seriously considering a merc for my 15. I have some moving around to do first. I attached a photo. Need to remove all the anemones, palays and clown. I will be adding some more rock from another tank. I have a couple rocks in my 40 that are covered w/blue clavularia that I just may add. I think it will look pretty nice. Just have to rethink my cover, thinking something similar to the cover on Ollie's tank. I can only get 1 in a 15 correct? Now I just need to get the show on the road here, once the tank is ready I need to find someone with mercs. I have been seeing many avaliable, today I searched and could find none.