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from all the research on independant test ive done rowa. works a little faster (only a few hours) and last a little longer (only a day or two) more than phosban.and comparing phosban to phoslock was a similar result.i havent read anything on the other brands,those test were enough to convince me GFO is GFO.therefore price is the only factor i look at.my choice is drs.fosters and smith phospure.
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