toxin

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...

A short while back someone asked about Corydoras catfish poisoning themselves during transport. Just this week I came across an abstract of a study very recently undertaken to identify the toxin(s) and provide more information on the process. Here is a "poster" with some data from this study...