Regret using white sand
The following is a data point for people looking at using white sand:
Well, I really liked the look of the white pool sand that I used in my 65, but now that the tank has been set up for about 3 months, I'm not very happy with all of the little piles of fish excrement all over the place. I've got a fairly dense carpet of dwarf sag in the front of the tank, but it is still noticeable. I took a few pics, but it doesn't really come through on the pics. In addition, the white sand makes the pictures look a little washed out, but it looks better in reality.
Next time: STS like my 75.