To RO or not RO

Discussion in 'Marijuana Hydroponics' started by sopappy, Jan 15, 2017.

  1. Sep 5, 2019 #41

    Socrapy

    Socrapy

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    Much appreciated, my eyes glazed over here and there but a great read.
    I think it's worth the effort, sitting doesn't work anymore, I don't want to replace chemicals with chemicals and the filtres aren't cheap.

    Out of the tap 8.4 after RO 6.5 and drops to 5.5 after awhile (which I have read by absorbing CO2 from the air but it keeps right on going down to 4.2 4.1
    but settles around there, is that like a saturation point for 40 litres ?


    seedlings are up but look so frail and vulnerable... I have had a world of trouble with seeds over last few years, multiple sources, must be me
    I just let them down, I'll start a thread, maybe somebody will catch something.
     
  2. Sep 5, 2019 #42

    Socrapy

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    great, another question... I have a tray on top of a reservoir, pump below fills tray above to just lick the bottom of the rapid rooter sitting in hydroton in the pot. Bottom two layers are in the flow , above that drains back down to rez. As long as the pump runs, it is circulating. When the pump stops, it takes 30 minutes to drain empty. (It takes 10 minutes to fill)

    I was thinking of running the pump for 30 minutes every 2 hours.
    roots will be hanging below pots in air for half the day approximately... too much?
     
  3. Sep 5, 2019 #43

    stinkyattic

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    Nope not at all. I only ran mine every 4 hours for 30 mins. If you think about it, the hydroton releases moisture and creates a nice humid zone for a long time after the water recedes. One way to set your cycles is flood, drain, set a timer, and check every hour to see where they start to droop, then set your cycles to flood an hour before you saw the droop set in. Air is great for roots!
     
  4. Sep 5, 2019 #44

    Socrapy

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    oh I like that droop tip, thank you
    (I'm only back a couple days and a gem already)

    The root zone is not full of the pellets, I'm not sure why I'm not doing that, pics in another thread coming up. Too **** heavy come cleaning time methinks.
     
  5. Sep 5, 2019 #45

    stinkyattic

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    Oh okay yeah in that case try the droop tip (watch it like a hawk so you don't unnecessarily stress your plants- FIRST SIGN OF DROOP) your results are going to be really dependent on the overall environment in the room.
     
  6. Sep 5, 2019 #46

    Keef

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    Hey Pappy !-- How U been ? - Stinkyattic nice to meet U -- Welcome to MP -- I'm in transition right now helping my nephew set up a grow -- I'm a water pharmer in my heart--
    I ran aero under LEDs -- I'm no scientist -- I would fill up a 35 gallon plastic tote full of R/O water and let it sit for 24 hours before use - came out the RO hose with a PH of around 4 - --24 hours later It's at a pH of about 6-- it needs to stabilize
    RO water got no cal/mag in it !- I add nutes to a new aero box then let it run 24 hours before using it - I use an air pump and stone -- U can end up chasing your tail on PH
    U got to let it stabilize then PH - My nute formula follows:

    Measurement --per gallon
    5 mils- Cal /mag
    5 mils - EM 1
    3 mils - nute concentrate ( I use botanacare )
    One scoop -- Mycos - ( I run a live res vs chemical res.)
    5 mils - Voodoo juice or beneficial bacteria tea
    --
    PH 24 as desired 24 hours later !-- I only changes the res. Once a month !- PH will wander some so I PH once a week !
    Hope this helps ?-- However U use it RO water got to have Cal/mag added to it !
     
  7. Sep 5, 2019 #47

    stinkyattic

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    With regards to your question about pH after RO, usually the carbonic acid does drop it into the low 5ish range over time, but this isn't a huge deal since the ionic strength is SO low most pH meters sold for home use won't be particularly accurate anyway. When you add the ph up it will give you back a little ionic strength and your meter will be more accurate. Be sure to use a mineral pretreatment to return the good stuff that RO removes: calmag to 100ppm to give moderate hardness, then whatever your nutes are.
    Sounds like you're doing a hybrid aeroponic setup. My expertise in managing one falls short and I don't want to give advice on a technique I'm not personally comfortable using. I hope other growers will weigh in with their experience!
    Edit: when I reloaded the page I saw the great advice from Keef... this is what you need right about now :)
     
  8. Sep 10, 2019 #48

    CasualGrower

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    I have not used RO....My water here is really heavy in Cal And Mag.... I just bubbled it for a day or 2 to remove the Chlorines . Before adding to my system.
    Kinda like setting up a freshwater aquarium in this area....Never had to ad cal mag...
     
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  9. Sep 11, 2019 #49

    Socrapy

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  10. Sep 11, 2019 #50

    Socrapy

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  11. Sep 11, 2019 #51

    Socrapy

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    oh, that's not working, sorry about that, me fix when time.. anxious to check on the girls
    ha, this Rockstar... you just click on the dulled part
     
  12. Sep 12, 2019 #52

    Ganjagrandaddy

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    I just put a few drops of " tap safe" for fish to sort the chloramine and chlorine out. works a treat. ironically , a company now doing the same product but renamed for plants water. cheeky sods.lol
    if using L.e.d , even with hard water i get deficiencies of calmag.
     
  13. Sep 12, 2019 #53

    Socrapy

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    [QUOTE="Keef, post: -------- I would fill up a 35 gallon plastic tote full of R/O water and let it sit for 24 hours before use - came out the RO hose with a PH of around 4 - --24 hours later It's at a pH of about 6-- it needs to stabilize
    [/QUOTE]

    I wonder what's going on in here. Only thing different is I pH downed to 3.7 but 3 days later it's still there ???
    40L (10gal) tank, bubbled once a day for awhile, longer if I forget, mostly covered
    2 tanks both doing the same thing and metre checks out.

    Update 13 sep.... still 3.7 ???
    poltergeist
     
    Last edited: Sep 14, 2019
  14. Sep 12, 2019 #54

    Socrapy

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    100_0399.JPG what the heck do I do with these three, I gave up on them but the supersoil seems to have kicked in.
    what now? I'm going in to flower, should I just keep going with molasses, teas, water or totally throw in the towel and start with the flower chem nutes?
    the one below the yellow card is off, had that herringbone thing for awhile now
    the one with the stick recovered nice from the bendy thing (supercrop?)

    update 13 sep
    molasses and ro water, flipping to flower, debating whether to kill all those microbes with flower nutes
     
    Last edited: Sep 14, 2019
  15. Oct 4, 2019 #55

    stinkyattic

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    debating whether to kill all those microbes with flower nutes[/QUOTE]

    Not necessarily the case, soil bacteria are fine with many common fertilizers. The canna terra bio organic line is great and expensive and the botanicare pure blend pro line is great and cheap.
    Late to the party again lol... but stopped by and happy to see your plants are looking fine to make it through flower intact if you keep looking after them as well as you've been.
     

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