Wow! I thought the painted critters alone were pretty cool, but adding that shaded background just takes it to another level. Well done.
I'm never going to be happy with my plain old black backgrounds now.
Oh no, I certainly didn't intend to discourage you with your tank!
If it makes you feel any better, I did a mural on the back glass of my last tank and it was a major disappointment! However, I still had to use that tank so had to look at my sub par artwork for the next 9 yrs! So, dofeel bad bad. Plus that happened to me and I am a graduate from the art institute of Pgh, albeit many moons ago.