i've heard of aquariums using IO as well...
if shimek tested all the brands of salt except CS, instead taking the CS specs off of the box, then to me the study is rather useless.
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-Quinn
Man, n. ...His chief occupation is extermination of other animals and his own species, which, however, multiplies with such insistent rapidity as to infest the whole habitable earth, and Canada. - A. Bierce, Devil's Dictionary, 1906
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