Here's what I've been observing... my Anacharis go through a cycle
(haven't yet determined the period) wherein they grow perfectly
straight, and then bend their tops to form a candy-cane shape. It is
INDEPENDENT of the light cycle. I've even left them on for 36h and the
effect is the same. (?) It doesn't seem to concide with some timeframe
after their feeding either.

I fertilize with chelated-iron, Fourish Excel (1/3 dosage only),
potassium permanganate (yes!), and I've also got 2 "Plant-GRO sticks
buried in the plant patches. Their analysis is 16-9-12

I also inject CO2 generously using the Carbo-plus electrolysis unit.
They can grow almost an inch a day.

Any ideas? Anyone else observe this with Anacharis, or any plant for
that matter?

Well, when my Elodea go to sleep they all "nod off", but straighten up
in the morning. I have a couple of stems in my 75g aquarium that seem to
form a shepherd's crook when they have reached a certain height. Maybe
it's a reaction to brighter light? Or ambient light that comes in
perpendicular?

I notice it with crypts especially x willissii "lucens"; it means they're
out of nutrients, probably nitrate - adding nitrate and phosphate
cures it here.
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