Well that is the wonderful thing about tanks, they reflect the taste and desires of the owner and while I like the natural look I think the blue pond look is really nice. It does add something to the whole nature of the tank and makes it unique and interesting in ways that it would not necessarily be without it. Every artist knows that there has to be a focal point and this draws the eye to it and gives you an introduction to the tank so you can savor the tank from there to really enjoy it. Good job. There really are no decorative rights or wrongs if it satisfies you and makes you feel good and does not have sharp objects in there to injure the fish. This is a great example of originality.