Explain PPM

[v35b]

I'll backoff a bit on the nutes next time I dump the res.

 

[prosport00]

I definitly think light is part of the problem. 400 for flowering, I would think, has to be a minimum to get the job done. I did get a new 600 watt MH for growing and use a 1000 HPS for flower and think I need another 1000. cant hurt anyway