Aqua tongs?

I use stainless steel tongs from my kitchen. I bought some aquarium tongs before and they are too weak to lift up most stuff, so I threw them out, they were a total waste of money.
 
Depends on your use. I have something similar, but cheaper, that I use for spot feeding bottom feeders. If you want to do things like aquascaping, I agree with Chefkeith that they're probably too weak.
 
I use Pampered Chef nylon tongs. They are really strong--I can pick up a chunk of live rock pretty easily, and won't rust or react with salt or fresh water.
 
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