View Full Version : PO4 Test Kit Question?
08/15/2008, 01:37 PM
The instructions say to shake the tube for 5 minutes, the card says 2 minutes, which is correct?
08/15/2008, 01:41 PM
2 minutes with a maximum time of 5 minutes. The maximum time is mainly for freshwater as freshwater will start to breakdown the chemicals and make the results unreliable after 5 minutes. Hope that helps.
08/15/2008, 02:10 PM
Thanks, that helps a lot. My arm was a noodle after shaking it for 5 minutes. Next time two minutes it is.
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