LaMotte Colorimeter (phosphate)

I have no experience with the more expensive model, but - the LaMotte Low Range Phosphate Colorimeter - the $175 model - can be considered the "standard" meter in the hobby. It is worth every penny if you want to keep close track of your PO4.

That said, if money is no object, there are $2000 meters out there. IMHO, the cheaper LaMotte is so widely used for good reason.
 
My apologies for my previous post. My brain was obviously not in gear. :o I, of course, meant Hanna - not LaMotte.
 
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