? - metal in tank?

[pufferfishi8]

i want to attach a piece of driftwood to a slate base. if an object in a tank had to have screws or wire, would any common metals (aluminum, or coated) be safe? i have assumed not. in this day and age i'm sure there is a plastic alternative to everything, but i'm still curious...i saw somewhere a suggestion to wrap java moss onto a wire frame, problem is salt in the water, i assume this may further limit this idea?
ps. of course i'm looking for cost effective ideas, best expressed as a hardware store solution.

 

[Darkangel]

If all you are doing is attatching a piece of wood to a slate bottom, I just use a brass screw. They can be found without to much difficulty. Your standard screw though does not reaally present much of a problem. I would think that anything except copper would be fairly safe. All this of course is only in refference to FW. Salt would be different.

 

[Dabbler II]

Stainless steel would be the best over all they don't twist off as easy as brass.Both Aluminium and Copper both will oxidize and then there is the standered Nickel plated one and that will last maybe 3-4 days before rusting. Your local Hardware Store should have good supply of thease.
Also if you are going to use wire also use Stainless steel