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Btw do all these issues arise with it's big brother??? The old school, expensive ones???
FWIW, highly accurate cuvets are very expensive. They machine the glass optically - this is a very tedious process.
There is a high degree of user error involved in these tests - any spillage of the reagent, improper mixing, smudge on the cuvet, etc. can cause errors.
I think it is a good general test, but definitely not something I'd bank on for pure accuracy.
my whole thing here is the lack of information in the directions.... i under stand completely it is cheaper made than it's counter part "hence the price tag" but why do we have to make mistakes and be misled here to come to the truth about it.... i have been dosing the crap out of my tank with amino acids because i always get a zero reading.... if it was to crash who's fault is it??? ya im obviously not using it correctly, BUT!!!!!!! im using it according to the directions.... seriously put a mark on the covent or explain in the directions that you only use one vial and it must be marked to ensure a accurate test....as it stands were just playing with disaster and taking everything for granted imho, following there directions.....Reefer Rob, have you tested your Po4 with a Salifert kit? Just curious what it's saying in comparison to the Hanna.
It is obviously necessary to keep the cuvet clean and streak free. Even when you think you have it pretty clean, if you look through it and twist it in good lighting, you're still likely to see streaking. Those little cloths that come with nicer sunglasses are ideal to use.
And I agree to other sentiments that if it's within 0.01 or so from the $300 model, what more could we really expect from the pocket meter?
my whole thing here is the lack of information in the directions.... i under stand completely it is cheaper made than it's counter part "hence the price tag" but why do we have to make mistakes and be misled here to come to the truth about it.... i have been dosing the crap out of my tank with amino acids because i always get a zero reading.... if it was to crash who's fault is it??? ya im obviously not using it correctly, BUT!!!!!!! im using it according to the directions.... seriously put a mark on the covent or explain in the directions that you only use one vial and it must be marked to ensure a accurate test....as it stands were just playing with disaster and taking everything for granted imho, following there directions.....
The Hanna po4 meters have been proven to be very innacurate. Anything under .1 and you might as well pick a number out of a hat...