Re: NANFA-- Barley straw

Christopher Scharpf (
Thu, 25 May 2000 22:56:01 -0400

As barley straw decays, it releases a chemical, lignin, which reacts with
dissolved oxygen to form hydrogen peroxide. This chemical prevents or limits the
growth of algae cells in small concentrations. Since the process may take up to
two months, straw be placed in the winter or early spring. Use 10-50 grams per
square meter of pond surface, depending on how much algae the pond is likely to
grow. Loosely pack the straw within a bag or pack and place it in the water
somewhere near the surface. Make sure water is able to penetrate the center of
the pack. Areas of high circulation and turbulence, like near the filter outlet
or in the waterfall, are ideal locations. Be careful not to add too much straw,
though, especially during the hottest months. The decaying process will reduce
the level of dissolved oxygen in the pond.

Chris Scharpf

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