Originally Posted By: ewest
Tests (studies) on barley straw for prevention/reduction of algae show mixed results. In some they work in others not. There is a lot more (chemically and biologically) going on than we know or understand.


ewest, I think of using barley straw as black magic. It might work, but not in every case and nobody that I know of can tell me why it works sometimes but not others.

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