Jumping Maxima Clam

I saw that one too, have you used this one? They are both about $155
I bought this one and the PARwise. If you want to compare your results to measurements taken with an Apogee, use the VBR. When compared to an Apogee 500 series, I have found that my PARwise under-reports PAR by ~20%.
 
Anyone have a link to the instructions on how to use Photone app on iPhone? The interface is pretty confusing. What do I need to get? PAR cards? iphone underwater case?
 

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