If your ppm is â??400" to start and it go`s down to â??200" it`s to weak !
if it`s â??400" and stay`s â??400" for some time it`s ok !
if it`s â??400" and go`s up to say â??600" it`s to high !
Start of low at say 200 - 400 ppm and just add moor if it drops over time
the ppm is FOR YOUR BASE N.P.K ONLY ! ! !
stoneinks Reviewed by stoneinks on . PPM levels? Ok so ive been reading up and down the cultivation section before i finish up my DWC set up and take off into the wonderful world of growing...one thing that i still seem to be having trouble grasping is the whole parts per million PPM thing. What is an average PPM for a 5 gallon DWC plant, what is too high too low etc? Also, what are some good meters to test? the local hydro store near me has a few, just wanted to get some more tips before investing. Rating: 5