So I bought the ecocube (a solana as it turns out). I am going to set it up for clowns/anemone. I am going to TRY a small RBTA since I like them so much. And will net the clowns in with it eventually.
Anyway, I was thinking of using a different color sand. I know there is black sand but what other choices are there (without getting gaudy

).
I have plain white sand in my 150G, and bare bottom in my 55G. Thought I would have something different again in the 24 cube.
I am not going to get a sand sifting goby as I had planned as I do not want to have to put a lid on it. So it does not necessarily have to be fine enough for a sifter.
Any ideas?