o.k I have to be different why?...mum told me!! this is what I have done and am ready for the comments I have themed my tank its not your usual aqauarium rocks plants looks like the bottom of the ocean kind of tank. I will post a photo soon. originally I wanted to have like an amusement park at the bottom rollercoasters ferris wheels merry go round ... you catch my drift 4 or so ornaments trees and the norm but but I looked high and low for these kind of ornaments to no avail . so I have set it up differently.Finally here is the question I am about to do is silicone the whole back wall with proper ornamental tiles to complete the ultimate back drop aquarium safe of course. what are the drawbacks??? all and any help is appreciated dazzler..