I also read something about don't get crushed corel sand, something about it doesn't go well in fresh water...
Actually, I would say that depends on what type of fish your planning on putting in the tank. The reason soem of the texts you've been reading advise against crushed coral sand is because coral will raise the ph of tank water. Some times just a little, some times a lot. If your fish prefer their water soft instead of hard, the higher ph may place undue stress upon them.
I have a sand tank (orginally set it up for corys who never actually got moved from their old tank
) and it has crushed coral sand in it. This tank has the highest ph of all my tanks and the ph tends to stay rock steady to boot (knocks on driftwood for luck
). It's on average two to three points higher then any of my other tanks. The celebese I have in there happen to like hard water so it's good for them. Unfortunately, the higher PH also means that I also I can't add any of the loaches I really want because they all prefer a much lower PH then what I have...d'oh
Ehh...anyway, I'm rambling. I hope I'm making sense. I've had the flu for the last threee days and I'm now just trying to stay awake at work. I miss my bed
Anyways, If this doesn't answer your question, just wait for the almighty EELZOR(tm), king of the beaches and lord of all that is sandy, to stop by and answer your questions