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In a message dated 8/23/1999 1:53:31 AM Mountain Daylight Time,
Aquatic-Plants-Owner at actwin_com writes:
> A possible data point in favor of Al sulfate: Mardel's "Brite N' Clear", a
> product that claims to clear cloudiness and remove phosphates from
> water, lists Aluminum sulfate as its active ingredient. It also "has a
> softening effect on the water" according to the label.
> Does anyone think this may actually remove phosphates? I wouldn't add it
> my aquarium, but I've been considering trying it as a pre-treat for
> changing water.
The phosphate may trade places with the sulfate and precipitate out as
aluminum phosphate. Personally, I wouldn't guarantee it.