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[APD] Re: Accuracy of lower priced pH test kits: Hagen vs. Tetra

> From: "David Grim" <grim1214 at bellsouth_net>
> I have a Hagen pH test kit about 6 months old and bought a Tetra pH test
> to compare the two.
> Anyways, the two kits gave me some very different readings, as much as
> units of pH for each tank (3 of them) by my eye.
If you are serious about doing testing (i.e., you want results you can trust
and plan to take action based on those results), invest in a decent test kit
right from the get-go.  Ya, sure, LaMotte and Hach test kits cost more to
start with but refills are real cheap (unlike those hobbyist kits where the
"refill" is a new kit).
George Booth in Ft. Collins, CO (gbooth at frii dot com)

I will second what George just said. Better test kits are worth the money! I have noticed with the cheaper kits with only one or two reagents for complex tests tend to degrade over shorter periods of time, while the better kits that have several reagents in separate vials are more repeatable over longer periods. Also, the titration-type tests that Lamotte frequently uses are *much* easier to read than the color chart tests, IMHO. Sooo much easier...

I've had good luck with some of the little Tetra kits but I like my Lamotte kits better. You get better labware with the better kits that both makes the kits easier to run and last longer (refills are cheap).

And better accuracy is always a good thing :-)
<engineer>One can not have too much good test equipment.</engineer>.


Waveform Technology
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