Stainless steel mesh

[Chef_axol]

I have a 30 gallon tank and have had great success with under gravel filters, so I was wondering if it’s safe to use one and put a mesh on top so the Axolotls feet won’t get stuck or poison them some how

 

[Creekratt]

Just a heads up. Some stainless, may not actually be stainless. Case in point, look at some of the cheaper flatware. It may have stainless stamped directly in the utensil. Rest assured I've seen some of these cheaper ones actually rust. Not sure if it was clad in stainless or there's barely any nickel or chromium in it. I'd do a little experiment with a small piece of said screen. You could place it directly in some water for a while to see if it actually does rust or not. Another point, if you cut screen to size the edges will have a very jagged edge, with tiny wires sticking out. These will more than likely stab your little friend and possibly cause some injury and even an infection. I'd just avoid it and use a piece of filter foam instead. I'd even avoid fiberglass screen as it does rot over time especially in wet enviroments.