I registered on this site a while ago and have just been lurking around watching your discussions. I've been keeping and breeding guppies for years and just really got into plants in the last year or so. I've recently had the luxury of installing compact fluorescent lighting and pressurized CO2 on several of my tanks. It's been a great experience, but at one point I had some problems with excess algae, so I threw in some P. fluitans (a really nice, red-rooted floater) to help cut the light a bit and hopefully act as a nutrient sump. Anyway, since I was using it for function, I haven't really been looking at it that closely, but tonight when I got home from work, I noticed little white flowers all over the top of my tanks! They were coming from the P. fluitans. I couldn't believe it and was so excited I had to share it with someone. My friends all think I'm nuts, but I figured you guys and gals out there might be able to appreciate this!
If any of you out there have any stories to share about your plants flowering, I'd love to hear them. If not, thanks for listening!