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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.

Cheers
 Charlie



Charlie Lear
Melbourne, Australia