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  1. Z

    Diy led

    Ok. Finally my work for construction and testing is over. 20cm×50cm 8×14 diodes 17%blue, 19%green, 64%red 163watt 463 umol/s; 2.84 umol/j
  2. Z

    HELP! Highest possible N/E ratios- Are my plants healthy?

    Hello again everyone. I have many projects during this grow of mine. One of them is to find highest possible N/E ratios for all elements which support optimal growth where N is nitrogen concentration and E is each of the rest essential mineral elements concentration. If we compare our ratios...
  3. Z

    HELP! EC meter calibration

    Hello everyone 1.0;) year ago when i was runing out of calibrating solution i decided to make one while my meter was still calibrated. I took advantage of Aqion.onl to make a 5.00 mS/cm at pH 6.86 in 25 C using potassium dihydrogen phosphate and potassium hydroxide. It's the solution my meter...
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