On Mon, 29 Mar 2004 06:41:48 -0500, John Bachman
wrote:

We are in zone 5. My pond is up and running but gets uglier every
day. Algae is building. The water temperature is 50 F and the fish
are moving about regularly.

With no plants there seems to be no hope of controlling algae. Are
there any plants that will grow and remove nutrients while the water
is so cold?

Canna lilies and cattails begin to grow in water temperature of about
40 degrees and parrot feather grows better for me in winter, Middle
Georgia Zone 8, but I'm sorry to say that may not help, since I have a
great crop of parrot feather and some string algae too. I don't
really know how to help, but I would like to recommend this article on
Green Water by Norm Meck of the San Diego Koi Club:
http://www.koiclubsandiego.org/GRENH2O.html

Regards,

Hal