Thanks for the input guys! I think I am going to try working with the foam and making it look good. I have all the time in the world to get it done...and I want to do it properly so I don't end up changing it again.

Should I secure the foam pieces together or to the back of the tank? And how well will plants root themselves in the Styrofoam?

I am getting ready to purchase an exacto knife...one thing down!