PPM Scale

[farmjohnny]

Hi All!

Just got the book. Nice job. Learned something the first time I opened it. Thanks for the hard work.

My questions. Are the PPM levels given in the book in 500 or 700 scale?

Also, most of the PPM levels I see in your forum don’t give a scale. Are you all talking in 500 or 700 (EC would be less confusing)?

Don’t want to go down that “lost in translation” hole (again).

Thanks,

Tom

 

[mrgrowit]

500 scale in the book; I need to specify that in the next version. In general, 500 scale for North America and 700 scale is mostly used in Europe. I totally get what you mean where it can get lost in translation. EC would definitely make it less confusing lol

[farmjohnny]

Here in Minnesota it’s about 50/50 so I learned to always ask. My grow shops mostly use 700.

Maybe put a conversion chart (EC -500-700) in the next revision? I keep one taped to the wall.

I lived out your way for many a moon (Blue Diamond). The Valley just got too crowded so I moved up here.

[mrgrowit]

Absolutely. Not sure when the next revision will be though.

Yeah this city is getting more and more crowded. Traffic is nuts and construction is always slowing things down. Oh well

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