You can cut them,.
From what I have noticed when there is an increase in nutrients in the
water column, The plants will put out side shoots to grab even more.

Marcus

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On 26 Feb 2003 07:59:27 -0800, (Artur) wrote:

Guys, I have a question. My stem plants, especially Rotalia, developed
long hanging roots creating Jurassic jungle type environment. Is it a
good idea to cut these roots, or are they necessary for nutrients
intake by stem plants? Please advise me. Thanks a lot.