how do you figure out PPM?

Can somoen explain how you figure out PPM (parts per million)
Thanks

Oakton Products

With a meter....ppm is also called TDS....total dissolved solids

The meter figures it out for you!

Thank you.... anywhere i can pick one up for a good price at?

These TDS or PPM meters are just used for hydro setups? and not soil correct?

I know mine are just for hydro. And PPM is a calculation based on what EC reading your PPM meter comes up with. Ebay usually has the best deals, and remember you usually get what you pay for.

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Originally Posted by Opie Yutts

I know mine are just for hydro. And PPM is a calculation based on what EC reading your PPM meter comes up with. Ebay usually has the best deals, and remember you usually get what you pay for.

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Right on