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Ceratophyllum demersum

>Date: Sat, 24 Apr 1999 13:18:27 -0700
>From: Robert H <robertph at best_com>
>Subject: Re: ceratophyllum demersum
>Date: Sat, 24 Apr 1999 08:15:02 -0400
>From: Cyberpet <cyberpet at videotron_ca>
>Subject: ceratophyllum demersum
>>>this plant is supposed to excrete algae inhibitors, i wonder how good at it
>this plant is.
>does anyone has experimented it ? is it really worth to keep it  ?<<

Claus Christensen (biologist, at Tropica) writes in a small publication on algae
and how to fight them, that it has been proved that some plants do excrete chemicals
that are toxic to SOME algae (allelopati). He mentions Ceratophyllum, Stratoides and Egeria having this ability.