[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Duckweed as an indicator

>Date: Tue, 4 Nov 1997 17:48:33 -0500
>From: Beverly Erlebacher <bae at cs_toronto.edu>
>Subject: Re: Q: low tech, low maintence tank
>> Date: Mon, 3 Nov 1997 17:35:09 -0500
>> From: "David W. Webb" <dwebb at ti_com>
>> Duckweed is a good indicator plant for a zero maintenance tank.
>Indicates how?  I mean, when the duckweed does what (flourishes/
>disappears/turns yellow) it means that there is too (much/little)
>what (nutrient X, Y or Z)?
>My guess is flourishing duckweed means plenty of nitrogen, but please
>tell us your experience.

Although I haven't made the measurements to tell what nutrient is high in a
duckweed-covered tank, I find that flourishing duckweed generally indicates
the right conditions for flourishing algae.  The nice thing about duckweed
is that it's a lot easier to harvest than algae.  ;-)

David W. Webb           Texas Instruments
(972) 575-3443 (voice)  http://www.dallas.net/~dwebb
(214) 581-2380 (pager)  2145812380 at alphapage_airtouch.com