02-19-2013, 05:47 PM
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I have sometimes cut off leaves [or more correctly, fronds, as this is a true fern], say alternate fronds. If you notice, the daughter plants only produce on alternating fronds, and these will be shorter than the others; removing just these is one way to open up some more surface, but of course the fronds that remain will continue to grow in length. Some new frond growth will also be aerial, sort of "fiddle-head" shape. They can get quite high if allowed to, and will be much thicker and sturdier, with very finely pinnate fronds.
But the best way with this plant is to remove some of the daughter plants and discard the parent (to another tank, or to the garden compost). I have WS floating in all my tanks, and each week during the water change I do this as needed.