I've considered buying the stainless steel tools, and if I was starting over I probably would get them. I'm pretty happy with my rusty old pair(s) of cutting pliers though. I don't see a big issue with using them in the tank. The problem comes in breaking them in. What I mean by this is that if you get a really nice pair of cutting pliers (not stainless) and use them in a tank as Dawn mentioned it's really had to dry them in such a manner so they don't rust. When they rust, if they are high quality and have a very small tolerance (or clearance) between the parts, a little bit of rust will seize them up really bad. The old pliers that I have are kind of cheap and I've had to work them again and again, but now they are so worn that they don't freeze up anymore because a fair amount of metal has been worn away between the parts. I don't even bother to rinse them anymore most times.