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Re: Aquatic Plants Digest V4 #1111
>From: Cavan <millsman7 at yahoo_com>
>Roger, what is a USP grade product. I may need a
>phosphate source. USP? United States Pangolin?
>Unsatisfactory Senile Person? Ultra Size *****?
United States Pharmacopeia. Its a reference for pharmacists - USP (or
BP, for those in Commonwealth countries) refers to high purity
compounds of a precise specification.
Obviously such purity and precision costs money, but you are guaranteed
to get what you pay for.