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Unread 06/06/2012, 02:04 PM   #107
Thatgrimguy
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Join Date: Jun 2011
Location: Gulfport, MS
Posts: 371
Its effective, what ever it is. My LFS is using about half a bag on a 330 and it's keeping phosphate undetectable for about a month. They used to swap gfo bi weekly and never got phos under .1


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