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Re: Phosphate test kit & invitation?

I have not used the AP phosphate test kit.  I have a LaMotte PO4 test
that IMHO is one of the better test kits I own. Meaning it gives me
results I "feel" confident of.  Testing of Minneapolis water gives me a
result very close to the levels provided by the city engineer. It has a
octet comparator - a plastic housing that the sample tube slides into
and can be viewed next to permanently sealed reference tubes graduated
as follows; 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.5, & 2.0.  The PO4 test and
the Fe test use an "axial reader".  The axial reader is a mirror set at
a 45 degree angle to the bottom of the sample tube so the reading is
intensified by using the full length of the tube.  A light source is
needed from above.  Petwarehouse carries the LaMotte line except for the
Fe.  The only source I know of for the Fe kit is directly from LaMotte.
PO4 test ( 50 tests) is $56.95 (Petwarehouse), reagent refills are

I use other LaMotte test kits and have some confusion and questions
about them (especially Fe)..  Have called LaMotte on a couple of
different occasions with questions and have gotten adequate to very good
help.  Also have gotten follow up email from the hobbyist rep to see
"how's it going? - get your problem satisfactorily resolved?"  I get the
feeling they are interested in me as a customer successfuly using
LaMotte products.  I have thought about inviting LaMotte to subscribe to
the list and respond to posts about LaMotte test kits.   Put the thought
out of my mind with recent events involving Greg Morin and you know
who.  Would it be appropriate to make an invitation to LaMotte to
participate on the APD?  Does this become a commercial participation
that is not permitted or frowned upon?  I have questions - would others?

Jay Reeves
Minneapolis that thinks it is Seattle