Home shop chemistry

[mklotz]

Hi Marv,
I dug into this a while back at my son's urging, since I worked at an aquarium and all our tools rust, no matter what we do. From what I read, stainless should be avoided because the chromium or vanadium in it will turn the solution into a toxic, none-environmentally friendly soup. Not sure about vanadium, but I suspect the chromium products are quite toxic. Whatcha think?

Sounds to me like you need to contact an aquarist, not a homemadetools guy. Sorry, but I can't be of any help on what fish can tolerate.