My leaf did not rust unlike most reviews and the suction cup worked on my regular fish bowl (not a tank). However, I believe all of the reviews that talked about the leaf not being safe for fish because our fish died a few weeks later after installing it. It’s hard to say if the leaf was the cause of the death but it could be a contributing factor. Plus, my fish never took interest in the leaf even when I tried putting food above it like recommended. Luckily this wasn’t too expensive otherwise I would have wasted my money. I don’t recommend buying it but if you do plan on buying it, I’d say consider the precautions
Beware of precautions