Ppm for hydro using RO water

Discussion in 'Hydroponic Growing' started by Davis443, Aug 10, 2018 at 12:03 PM.

  1. Hi all starting to grow a new set of plants they are going well so far, they are being grown in soil as last time i had problems with a hydro grow.

    I used tap water so could not get an accurate ppm going and then i followed a feeding schedule devised by a company which burnt the plant up.

    So now I'll be starting a new grow using a RO water purifier, so the question is this

    When using the RO water what should I start the cal-mag to ppms as i know there could be a nutrient lock with these, i will be using flora series taking the ppms to around 350 for veg and slowly rasing to 650 for bloom

    Sent from my Nexus 6P using Grasscity Forum mobile app
  2. What percentage of cal mag should I be using for example, if i use 100ppm of nits what percentage of that after should I be adding cal mag? I have seen some videos of growing on YouTube a lad called hygro hybrid and they recommend using RO with no cal mag

    Sent from my Nexus 6P using Grasscity Forum mobile app
  3. Take your water. It should read 0-20ppm if its RO. Add Calmag until you reach 150ppm. Then do whatever you want to it. Just start with a base of 150ppm

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