i know the feeling...every time i look at the tank with rock for the substraite i'm like "damn that would look cool with the black sand from the 180gal and then i could put red sand in there...." i go on like that for hours then out of lazyness don't do anything...wake up the next day and look at the tank with the rock and say " damn that would look cool..." maybe someday i will do it...but then again the lazy is powerful in this one so i may just wait till i have to move then do it as it will be mostly done...