Heisengrow
Well-Known Member
Yeah man ppm is a relative term that can be used loosely.there is way more to it than that.a couple extra ML of calmag can add 100 ppm.no real world difference between 600 and 680 lol.its all about what drives your ppm and what' in it.you can' say ppm like it' a solid number.i run around 650 - 750 but number means nothing to someone who doesnt know your formula or someone elses.that number means nothing.Yea I'm pretty sure it's not a very good light but I used it prior to this grow and it did good at 2 weeks last grow I had my ppm at about 600 I barely gave this plant 680 ppm at 5 weeks it was my doing. I was starving the plant on nutrients so I doubt it's my light.
Here' is 3 plants 3 weeks old that are twice the size of yours under cmh.your light sucks man.