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Over a year ago I bought some Hygrophilia polysperma and planted it in a
newly set-up 29. It rapidly grew to the top and reproduced by the side
shoots that form at the nodes. Then it declined a bit, possible because of
old lights. When these were replaced the growth restarted.
Anyway, about six months ago I planted some cuttings in a 20 long that
apparently wasn't as hospitable. These grew a little but seemed to expand
more horizontally. I sort of ignored them.
Today I removed some of those for another new tank. I pulled one out and to
my surprise out came another and another and another. . . They were joined
by subsurface runners, looking for all the world like chain swords (although
the leaves were a lot different). None had any internodal shoots.
I can't find a reference to this behavior in Kasselman. Would insufficient
light cause it? The tank has 2 WPG but the tubes are also old.
BTW, if it stayed at this size it would make a pretty good foreground plant.