Hi samh,
I have always kept these in a tall tank
You can TRY removing the TALLEST leaves (unless they are all tall?) and start with new leaves. However, the plant will grow to size, I don't think you can treat it like a lotus, but worth a shot..
I usually let the leaves lay flat on the surface and such. Not really sure if these plants can be tamed that way.
Keep in mind that these plants have a growth phase but then shed ALL leaves and go into a suspended state until the next growth 'season' or trigger. So, you may just want to let it do it's thing as it is really only temp. Maybe a few months, but I would not expect it to grow older. That is MY experience, so does not hold any scientific value...
Sorry for the non-help I guess
