Issues with Hanna Phosphate Checker Inconsistent Readings

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Oct 1, 2014
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#1
I bought a brand new Hanna phosphate checker from Marine Depot. Its the ULR (Ultra Low Range) model which is supposedly better for SPS. I am so far getting very inconsistent readings last night it said .30 then right after was .03. Has anyone had similar issues with it? At this point considering returning it :(
 
Joined
Sep 8, 2017
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#2
Just bought one last week and messed up on the first couple of tries due to user error. The next few tests were spot on. I made sure the cuvettes were spotless prior to reads and to use as much reagent in the packet as possible. Also rinse the cuvettes after each use with distilled water to prevent stains or build up.

Hope this helps.
 
Joined
Oct 1, 2014
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#3
Appreciate it wondering if anyone else has had similar experience or maybe its just defective. I have tested it several times with multiple readings spanning up to .25ppm difference.
 

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