Recent content by Glenkush

  1. Glenkush

    Nutrient Burn?

    No i use a local brand that no one ever heard of, it's dry salts that i mix to get the exact same ratio as the jacks hydroponic 321 formula that some guys use over here. This is not commercialized for cannabis but for vegetable grown in greenhouse so it's really cheap, for 200$ i got 15kg base...
  2. Glenkush

    Nutrient Burn?

    water ph is about 7, when i add full strength nute ph goes down to 5.8. but right now im about 3/4 strength so i manually ph down to 5.8, ph slowly raise to 6-6.2 until reservoir need to be filled again.
  3. Glenkush

    Nutrient Burn?

    This started to appear before i cut nitrogen in half. Potassium and Phosphorous level are the same. Had similar problems on my two last run with an other strain and GH Heads formula, it's the first time i use jacks 321, the grow went pretty good exept for the very last part compared to GH where...
  4. Glenkush

    Nutrient Burn?

    Stems are green, petioles of the leaf are indeed purple but it doesn't bother me since i think its pretty common under LED Lightning
  5. Glenkush

    Nutrient Burn?

    Potassium was my first thought but because i was seeing from top i concluded it was not the case. Water is tap, never been analyzed but it's 80ppm, PH is around 5.8 - 6
  6. Glenkush

    Nutrient Burn?

    Forgot to add that i have a fungus gnat problem that was going out of control, could this been affecting the plants? Situation is under control right now, i added a layer of sand over the coco, next run coco will be pasteurized prior to usage.
  7. Glenkush

    Nutrient Burn?

    Does this look like heavy nutrient burn to you? It started from the very end tip of the leaf and now the margin of the leaf looks burned. This is only visible to the upper leafs that get the most light, lower lead are healthy. -Strain is White Widow from seeds, 2 phenotype are affected, 2...
  8. Glenkush

    Tool - Vapor Pressure Deficit

    Did you do it yourself? It's pretty cool, im in the process of programming the exact same thing except i want to implement datalogging. Im using Microchip for the microcontroller and the sensor is a DHT22. I will the a look at your code for sure! Thanks for sharing!
  9. Glenkush

    Question about Calcium Nitrate

    Humidity content in your dry calnit can change the weigh of it. You are probably putting less since you weigh the total of salt plus humidity. I keep my stock salt sealed and i make concentred stock once in a while. 1 gallon RO water, 378g calnit : 10ml = 1g. You need 2.3g of calnit? Put 23ml...
  10. Glenkush

    Replenish co2 in sealed

    600-800 in occupied building... With how many humans breathing and how many hours a day? I Doubt one human breathing mostly at nights inside the house is enough for 16 plants, if im wrong, why people bother venting outside, beside to get rid of the heat in the summer? Last winter i ran 4 plants...
  11. Glenkush

    Replenish co2 in sealed

    Is it a good idea to install a Co2 tank, a Co2 Bag or a 5Gal of Sugar/Yeast only to maintain Co2 level in the 300-400ppm safe range, that way i could run sealed and have a better control over environement sinice winter is comming and im running with LED and they require higher temperature. Also...
  12. Glenkush

    Potassium def?

    2.5 gallon plastic pots 75/25 Coco/perlite
  13. Glenkush

    Potassium def?

    Measured runoff ppm today. Its 320ppm thats odd, the tips are burned like they are getting too much....
  14. Glenkush

    Potassium def?

    I'm drain to waste. So what I mix and put in the reservoir is exactly the same beside pH. I try to ph the batch I mix 5.75 then add it to the reservoir and it raise close to 5.8-5-9 thru the night and I check the reservoir once every 2-3 day if it raise to 6 I add pH down until I get 5.8. so pH...
  15. Glenkush

    Potassium def?

    EC is 620ppm (0.5f) and I try to keep pH around 5.8-6 usually when reservoir raise to 6 I pH it down to 5.8. But right now it's at 5.75 I did put a little but to much pH down when I top off the reservoir
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