Nub question... ppm

I tried to do a search and read lots of things and i have no idea what people are talking about with ppm what does that mean i thought it was parts per million maybe but its something i should get a reader for like my ph meter? can somebody give a silly nub some informatino please

Yeah, parts per million is right.

okay so they say check parts per millino... WHAT part is the ppm refering to

PPM is parts per million it is a reading of the total disolved solids in your make up water. 0 PPM means that there are no traces of metals,chemicals, or anything, pure H2O. So when someone says check the PPM that means with a TDS meter (a meter that that tests PPM) check your nute solution to find out your PPM. If you start out with a 0 PPM reading of your water, than after adding your nutes you have a PPM of 450, that tells you that you have 450PPM of nutes in your solution.

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