Originally Posted By: 7mag
Does anyone know how much Alum to apply for phosphorous. My problem is with the nutrients but not with suspended particles. My water is fairly clear so I'm not sure if the mason jar test is applicable for my situation.


Mason jar test has nothing to do with adding alum for nutrient inactivation. I feel your frustration. Lots of talk about using alum for nutrient (phosphorus) inactivation but no info about amounts to use. Apparently it has a lot to do with the individual chemistry of the pond.


http://www.dnr.state.wi.us/org/water/fhp/papers/alum_brochure.pdf


http://www.phosclear.com/downloads/Control%20of%20Lake%20PO4%20with%20Alum.pdf

There is an alum product called Baraclear produced by the Haliburton company that purports to inactivate phosphorus.

http://www.pondperfections.com/html/baraclear.html

I have some contacts that will probably know how much alum to add for phosphorus inactivation. I'll get back to you.

Last edited by Cecil Baird1; 06/06/10 08:48 AM.
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