Planted Tank Guru
Join Date: Jul 2010
Location: Pflugerville, Tx
To shorten the group without the ugly browning end, you could go about it a bit slower. Pick the tallest and cut it down close to the bottom. As you reduce the tallest in each group the whole gets shorter with the brown ends down almost out of sight. Something like you would do to trim a tree without it looking like it had been butchered by topping.
When I cut mine, I found the remaining shaft got rotten at the top and gradually worked its way down until the whole blade died.