metal

I'm not talking about metal tools specifically marketed towards tanks, but more so any metal. I looked it up and the answer was no, but that was answering the context of metal decorations. I mean like putting scissors in the tank to cut plants, using tweezers to aquascape, scraping off algae...

So, I’ve worked in food production before and we used a lotta stainless stuff, and I notice a lot of people use stainless in their aquariums. My question is about rust. Will you visually see corrosion first or will you notice a drop in water quality first? And what parameter do you have to look...