Making sense of Phosphate readings

[MarkoD]

I have been running zeo for 3 weeks and my phosphates are at .35ppm as per the Hanna checker

[mark]

simple as the Hanna testers are, drift you're seeing could be just errors in testing

[Magickiwi]

Originally Posted by mark

simple as the Hanna testers are, drift you're seeing could be just errors in testing

+1 I think those are pretty good #'s for Hanna testers. They are only advertised +/-5% accurate and I would be very surprised if they are really that accurate.

[Proteus]

I thought I was having po4 issues as my red sea kit was reading upwards of 0.16.
Today I tested against elos and salifert and both showed 0.03 or less