Assuming I get the leak fixed in my new 125g tank, I'm going to be setting it up in the next couple of weeks. I'm trying to figure out the best substrate to use. Ive seen a couple of posts about the 3M T and S grade black sand, and I like the looks of it. What else do people use, what are your favorites? I would definitely like something that doesn't stick to my rays like the play sand does, and I want something black or very dark to help them stand out against it.