Euryale has been transplanted into a 10" pot, and moved to it's own growout tank. I will fertilize it tomorrow, since I like to give the soil a chance to settle for a day before I insert tabs. I will raise the water level slowly over the next couple of days to allow it to cycle (all water is from large, mature ponds, but the dynamic is completely different in a new tank). Fish will go in later in the week--small ones this time, and hopefully wary of the spiky leaves. The plant will get full sun for 8-10 hours/day and remain here until it is ready to be installed in the pond, unless something goes wrong. I also don't plan to move it into a larger pot again, because I really need to dwarf the mature plant to fit in the limited space I can give it.
The leaves are only 5" across or so, although they are getting rounder, and very thorny. I think cool water temperatures have been a factor, as well as the lower light levels in my nursery ponds. In this location, with the small tank, I will have to monitor to make sure it's not getting too hot. I'm looking for 12-15" leaves before I move the plant again, and shooting for 3 foot leaves in its final location.
