fuzzydunlop
New member
Hello all, I'm just now learning about PPM and it is a little confusing. My understanding is that during early flower (which I'm at), you should be feeding your plants about 900 PPM and the runoff should be the same. I'm wondering, is that what it should be EVERY feeding or just the feedings that you give it nutrients? Because I've been giving them GH bloom nutrients every other feeding, so the PPM is correct for those feedings, but the other times, I just feed them PH'ed water with a tsp of CalMag and the PPMs are obviously lower (around 500) since there are less nutrients. Can anybody shed some light on PPM and the correct readings? I'm using a TDS meter btw.