A couple of examples
Consumer priced package:
http://www.aquaticeco.com/subcategories/4567/eXact-Eco-Check-Photometer-System
A kit colorimeter:
http://www.iorodeo.com/colorimeter
Well the last link was informative being an open sourced project but like I said that equipment looked pretty rough to me. I would like something user friendly that doesn't require a science degree just to run.
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