- a month or 2 ago, I allowed aerial stolons from both a U. nelumbifolia & a U. humboldtii clone to reach the lower reaches of my 75 gal tank where there is a layer of live LFS (I felt reasonably safe since all of the other utric pots are sitting on pots to raise them closer to the lights). Within a few weeks, both had launched the largest leaves that I've seen from any of my plants to date. Then a week or two later, the U. nelumbifolia sent up three simultaneous flower stalks. The largest was over 1/8" diameter near the base. I've had to train it multiple times to keep from frying in the lights - it is probably close to 3' long. I'm not sure what the two plants find down there that is so much better than in any pot - but I'd love to find out ... I'm also thinking that I'm going to need to stop this experiment soon before those two completely own the tank