I love your tank. I've been trying to decide what to do with my new 150G tank and I think I will try something similar to what you have done. Some Angels with Tetras and Cories.
I like the look of the darker substrate as well. I want to do sand, but the Eco-Complete looks quite nice.
Thanks Weldon! an 150 gal would look awesome. This is my first try with the darker substrate, i like it. The eco complete has a coarse sand like quality, which looks nice, but, like sand, its a bit of a pain when it comes to siphoning and water changes. But I have managed to work around it by pinching the siphon tube to slow down the flow and not lose too much substrate in the process. Good luck and keep us posted!