It always puzzled me as well as that is what ive heard. I usually tied them to a rock with an elastic band or string. They would start off green, then over the course of maybe between 2 and 3 months they would develop brown spots and rot from the root up quickly. The smallest leaves would wilt and turn to brownish goo, then the larger ones, I usually tossed them when the root went so they werent adding to the bio load, but generaly 70% of the plant looked brown spotty and rotted.
Moonie - Miyagi
~ It's a betta life ~