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**To**:**<aquatic-plants at actwin_com>****Subject**:**Can someone check my math?****From**:**"Aaron Ivers" <aivers at betamachinery_com>**- Date: Mon, 9 Apr 2001 08:29:36 -0600
- Importance: Normal

I'm trying to introduce some more PO4 into my tank from AP's "pH Down", but would like someone to check my calculations before I start. The packaging says that it is 30% phosphoric acid. I'm assuming this to be H3PO4 (which should be about 97% PO4). Is it acceptable to assume that 1 mL of this stuff then represents (1000 mg x 97% x 30%) or 291 mg of PO4? Then throwing 1 mL into 291 liters of water should produce 1 mg/L of PO4, right??? Regards, Aaron Ivers

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