I checked in 2 days my test jar ( just playing around). Went from nasty to drinkable. I wouldn't really drink it but it looks like regular tap water besides all the crude at the bottom. This was done with very little alum.

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The people who say I can't do it can just sit the @^#% down and watch me. Friends call me Rusto I also subscribe to pond boss mag. http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=504716#Post504716