[MoribundMaverick]

So I've been pet searching over the last few weeks, and I've pretty much decided on fiddler crabs and something else. I was thinking about a turtle, but every time I've gone to Petco or some other pet store for inspiration, all I can look at are the hermies. I guess I'm just ready to start crabbing again. :]
I lost a crab in March, and I took it pretty hard- I'd had her for over a year, and we'd grown really attatched. Or at least, I had to her. =P

Anyways, I'm ready to start crabbing again, but before I get the hermies, I want to arm myself with everything I could possibly need. I know my tank has to be lacking something. So here's the advice I know I need...

1.) What sand should I buy? I've been doing Calci Sand but I heard there are much cheaper and better alternatives.

2.) How do I do the shower caddy thing?

3.) I've seen leaves and nets in other crabitats... what are those?

4.) What do I actually need to look for in a hermit when I'm buying?

I still have the tank set up how it was when she died... what I have are:
Two water bowls (one salt one fresh), thermometer/humidity thing, a climbing wall thing, extra shells, a gladwear lid to play on, and some coral pieces.

Exactly how many extra shells should I have if I only start off with two-three smalls?
And do you have any reccomendations on what salt-water conditioner to use?
What foods are usually best?

Thanks,