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#20
06-12-2009, 01:37 PM
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Take a sample of tank water
Heat to 80oC Allow to cool for 5 mins Take PO4 test What does this do? PO4 is bound into the water molecules, when not heated only the loose PO4 elements are tested, by heating it PO4 elements are released and as such giving you the TRUE PO4 reading. |
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