Re: Alum as a device for algae control?

>From: Nicolas Livingston <nickliv at halcyon_com>
>The local lakes in my area are in serious trouble.  High levels of =
>phosphates have caused a brown algae bloom that is crowding out the =
>higher order plants and causing other problems.  One of the plans to =
>help clean up a small lake involves the addition of alum to the water.
>The person who mentioned that to me didn't know how the alum would =
>prevent algae growth, so I thought someone on the list might be able to =
>explain it.  I presume that the aluminum would bond with the phospohates =
>making them unavailable to algae, but I honestly have no real idea.  And =
>if alum prevents algae in lakes, could we use it in our tanks as well?

I haven't heard anything about alum, but I use chelated iron as a phosphate precipitator.  The Dupla Fe drops really help in this area.  

David W. Webb
Enterprise Computing Provisioning
Texas Instruments Inc. Dallas, TX USA
(214) 575-3443 (voice)  MSGID:       DAWB
(214) 575-4853 (fax)    Internet:    dwebb at ti_com
(214) 581-2380 (pager)  Text Pager:  pgr at ti_com Subj:PAGE:David Webb