yeah it looks great! i thought it was a mixed bag of substrate, under the blue's looks really nice. i havent really given mine chance to do anything its only been running a month so time will tell! i have it 2inch thick which i heard is too shallow for a dsb and too deep to be stirring around, would you reccoment removing some while its still an unstocked tank?not to sure depends what its made out of i guess, does yours go like mine how some pieces go grey? i realy love the texture it gives off