Please Explain How/to use PPM

I don't understand what optimum is. I'm going to purchase a ppm/tds meter in hopes of being more accurate. Please help! Thanks!

you have to look at your nutrient chart
witch is brand specific
look up one on google for a better idea

toker 10 said:

you have to look at your nutrient chart
witch is brand specific
look up one on google for a better idea

Click to expand...

well said, and to expand on this, test your water prior to adding the nutrients, there will be PPM in the water, and subtract that from your desired range..

I can actually get my PPM's over 3000 with a certain strain I like to grow.

RO or Tap water? Are you using a PH meter as well?

I always say, dont add it if you cant measure it.. jmo