Hanna Phosphate meter verus ELOS test kit

[MikesReef]

Hello

I recently did a little experiment testing my ELOS phosphate test kit, and the Hanna Phos meter. Upon testing I got the following results

ELOS test kit Phosphate o to 0.05 ( hard to tell exact but the color seems in between the two shades of blue)
The Hanna meter on the other hand gave me a reading of 0.5

I am running GFO (Bulk Reef Supply) so I expect my phos levels to be low. Is it possible that the HANNA meter is reading ten times the level of the ELOS test?

Has anyone had issue with the HANNA Phos meter?

 

[lefkonj]

I too was using the ELOS and have switched to the Hanna. I find that I have to run the Hanna three times and then take an average. It just varies too much but the second and third time are much closer to one another, when compared to the first.

 

[SlingingBuddha]

I just got a Hanna and generally test two or three times. My general readings are from .00 to .05 Just my experiences with the checker