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>.
-Bill