I'm thinking about changing my ADF's tank from gravel over to sand and am trying to decide between black and the regular sand color. My ADF's are much lighter in color than some I've seen so I was thinking they would stand out better on black...I tried looking online for pictures of any on black sand but can't find any. Anyone else have theirs on black sand? This might seem dumb, but I just rather not waste money buying one color only to find out the other one is going to look better. Thanks for any input!