Can you use white sand?

[bryce2003]

It's actually called GARNET sand. May be why you were confused about staining the water.

There is a place near the airport on the northern side of the Gateway Bridge that sells it. I was looking for stuff ages ago and they have it in their yard. I think it was about $25 for 25kg's but it may have gone up. It's used for sandblasting as was stated but was told by many a sandblaster that they aren't supposed to sell it and would have to go through a supplier. I can't find their number but shouldn't be hard to find it in the Yellow Pages. Once you find out prices could you please let me know as I'll be after some in the near future. Hope this helps.
Cheers,
Bryce.