Strange as it sounds, I've had no luck with this plant. I buy it in a round (about a silver dollar size) online, float it in my tanks where all of my other floaters thrive, and it shrivels to mush. I didn't (at the time) use anything but liquid ferts, Aqueon Plant food, for my floaters. I've tried it in pH of 6.2, all the way up to 7.4. (I have a well, and also Municipal water, so different pH.) But it always just stops growing and falls apart in my tanks. My other floating plants thrive. I've tried it in high light, and medium light. No go. I really love the stuff, but can't keep putting out 25 bucks a pop to buy it online when I can't keep it alive. Does it need something that my other floating plants (frogbit, water lettuce, hornwort) don't? It's been about a year since I've had it, and am thinking about buy more to try again. Anyone else with this issue?