From a fellow grower: I’m having an issue growing. I hooked up a RO SYSTEM . Shows 0 ppm. I still have bottom go yellow leaves then traveling upwards.
Can’t get it to stop. This has been going on for 4 years. I been asking everyone & city water department.
Could you please help if you can.
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R/o system strips away all nutrients yes your at 0 ppm of everything
Now add nutrients they are starving. Start at 1/4 dose
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Welcome to the community ! Ding I hate you have been smokeless 4 years. If your system doesn’t workout . you can always Buy a couple bags of organic potting soil. Good luck moving forward. 
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I concur, plant looks like it needs to be fed.
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