A razor blade? My aquarium didn't even survive arriving the first time. There was broken glass the first time I tried to buy it so I had to send it back and order a new one, and then they put fragile stickers all over the thing. (English Translation: I would but I am afraid I would break it.)
Also razor blades lay on my list of irrational fears due to a strange event I won't get into.
Is the calcium dangerous? (Calcium sounds like a good thing to me considering I have to dust the crickets with it for my frog...)