I recently purchased a Tomini tang (I have a Lemonpeel tang right now). The Tomini tang is significantly bigger AND I rescaped half the tank AND the LFS agreed to take the fish back if there were aggression issues in my 525xl (sorry just felt the need to cover my bases there). Anyways, the two get along very peacefully (if anything the Lemonpeel is the boss) and generally avoid each other. However, they both poop (HUGE ...payload... btw) in the EXACT SAME spot of the tank. The middle of the left side of the tank right against the glass. You can literally see accelerated algae and detritus where their poops land. Do fish seriously sync up their pooping locations?? Sorry for the immature discussion but I'm amazed at how synced up it is.