Washing stones or new

Discussion in 'Growing Organic Marijuana' started by 2cent420, Jan 15, 2023.

  1. I have 300lirre pearlite and 200l lava rocks
    All was used in a bed that went salty

    do I wash em to reuse ? Or do I get new stones ? Gota use the ro filter if so gona take a day to fill the bath lol but didn’t wanna waste all that time if they will have absorbed somuch sodium it won’t wash off ?
    Pearlite is green from being in a swick is that useable still?
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  2. I'd use plain tap water unless it's really bad in some way. Check the dissolved solids with a PPM meter and you should be fine once you reach whatever your tap water ppm started at.
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  3. The time and labor cost might not be worth it but you could use bleach and hydrogen peroxide to try and remove the mildew from the perlite, the only problem is perlite is fragile and breaks down easily. Lava rocks would be easier to wash clean. I agree with TimJ, I'd skip the RO water and just use tap unless you're on really bad well water, etc.

    To assist with the perlite wash, I'd suggest using a 40gallon bucket with drain holes punched thru. Stick the perlite in the bucket, stick the bucket in the shower, place a screen over top of bucket (since perlite floats)....and just run the shower head over the bucket for 15mins.
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  4. Spot on ppm wohooo thanks

    gona do a gypsum wash as it changes salts to sulfates which was out easy
    Then do em1 soak
    Then plain and measure ph

    buy new here I need 5bags at £29 a bag yeah like $35 and 5days wait

    I think I can run ro water in 24 hrs 100gal so il do that tap is 400ppm 7:1 ca mg
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  5. I'd skip the bleach as she grows in a living organic medium.
    Bleach is a strong and effective disinfectant. Its active ingredient, sodium hypochlorite, denatures protein in micro-organisms and is therefore effective in killing bacteria, fungus and viruses. Even the chance of left over residue would keep me from using it. I believe it is only salts she is trying to remove. A better choice might be soap nuts. I believe the salts in the aeration material become hydrophilic in the presence of a strong surfactant like soap nuts. This is similar to flushing a growing medium to remove salt build up.
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  6. Good call on soap nut I use them for washing clothes got bags of them
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  7. Green on the pearlite is most likely algae.
    Salt /sodium should rinse out with hot water

    Sand, pea gravel even broken glass will replace the pearlite and the lava rock.
    If you not wild about those options then buy new pearlite and lava rock .

    My vote is replace the old grow medium with a new grow medium.
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  8. That's like +10-5 gal buckets each. That will take some real time and effort. Probably lots of water too.
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  9. I swapped perlite for pumice. Soaking it in hot water cleans it up like new.
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  10. I have a mix pumice as it’s expebsive here but wanted it for benefits
    I did notice in bath they go white instantly where as lava rocks running black still lol

    almost clean water keep throwing gypsum in to dislodge salts
    Once clean I wil soak in ro clean Rivne and resold check ppm and add em1 then 1 last Rince

    and yes I used 200litre plain tap water
    And will need and filling now 100litre ro due to volume

    I have a broke back lol
    And plants are locked out I do hope they recover once I pot up I need a foilar for them I think
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  11. Omg 17 hours 4buckets filled with tap to wash 12 bucket fulls later I’m stil washing off soil from inside the lava
    Finaly runs clear now fill ro up and rince fill rince fill shake n sit

    ppm in 35
    Ppm out 95
    Last fill tonight

    Washing my pearlite now uggghh yuk like cement stones at the bottom lol
    Skimmed floaters to buckets
    Sinking heavy sludge to bin

    funny looking back this is half my grow almost done
    Next stones for the other bed

    wow hahahah
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  12. The perlite won’t wash clean its ppm and ph still high
    Shal I buy more pearlite or are clay hydroton ok!?
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  13. Have you tried a soak in water pH-ed with citric acid to 4.0? Then rinse in plain water an hour after? I don't use clay myself. So, I'm not sure about that one. I use rice hulls or perlite. I'm not even sure the above suggestion will work. I'd try a small solo cup first and if it works well do your whole batch. I recycle everything I can so I'd give it a try.
  14. It takes 2 hours to fill my water bucket lol and I’m now on wash 8 and I have 2 buckets hahaha I feel like pouring them on they highways and watching the vans smash them up lol

    I will get new and use this on the allotment beds
    Just wondering if the clay balls would be like lava. Rock but lighter
  15. How do you guys wash your hydroton or at least remove roots after a dwc grow?
  16. We don’t our soil digest roots we leave ‘‘em be

    but otherwise use an enzyme hydrozyme or em1 soak 24 hrs so digest ‘em n h202 and phos acid for salt
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  17. Wash em with a high pressure gurney.
  18. I don't think there are any DWC grows around these parts of GC. You will get better info asking this in a hydro section.
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  19. I am still waiting to see an organic hydro grow in this section lol

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