Information on African Land Snails,Please!!?

Question

I have a spare 2ft by 1ft glass tank & i have for a while wanted African land snails,i want to know allot about them BEFORE getting them so to anyone who owns or/& know a good deal about them please answer back!! Thanks.

1) What size tank/viv do they need & do they need a heat pad?

2) I guess they eat the same kind of food as wild snails?

3)What equipment do they need(you know feed bowls,rocks...)

4)How long do they live for if well looked after??

5)Do they make okay pets?

And finally any extras that they need or anything/facts or websites about them would be greatly pleasing!! =)

Thanks. x*x