There are a few around.
Pinpoint
Hanna
Milwaukee
These guys sell Hanna and Milwaukee
http://www.automatedaquariums.com
www.drsfostersmith.com sells pinpoint.


Unfortunately
the only pH monitors that I have found are the 2 that dupla sells. Is
this it? Or am I going to have to spend $500 for a scientific grade
meter (which I won't).

Ken