In article .com,
wrote:

Has anyone with a rec pond ever tried barley straw for algae control?
I have a 6 acre pond and I am ready to deploy but it'll cost me around
$800 to do it.

Barley straw will not kill algae, it prevents it. I buy large bales
very cheaply. It must be loose so light and air can contact it. I run
my bubbler under the bale. They recommend 4 or 5 - 35# bales per acre.
So for you they would recommend 25 to 30 bales. That is a lot less than
$800. I get mine from my local ACE hardware, but you probably could buy
direct. It is at:

http://www.baleinabag.net/pondtreat.asp
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18,000 gallon (17'x 47'x 2-4') lily pond garden in Zone 6
Cheers, Steve Henning in Reading, PA USA