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  1. Helmut79

    What might be causing PH to drop in the rootzone?

    Plants look healthy besides some minor cupping close to lights. They are almost 4 weeks into flowering. I've been doing the 1:1.5 extraction analysis for the rootzone 2 times a week and I can't understand why the PH level drops to between 5.1 and 5.5. Measurements are taken before watering and...
  2. Helmut79

    Few questions about rootzone analysis by 1:1.5 extraction method.

    Firstly I would like to say that I have compared the results of the same mix by measuring right after mixing it together vs putting it back together and waiting for 2 hours before taking the measurements. It read only 20 ppm more later and ph was exactly the same, so basically in my experience...
  3. Helmut79

    Gassing with Co2 and following VPD chart.

    So much different information I have seen and heard. Lets try again to bring up the discussion please. So I'm using CO2 at 1300ppm. 1) What temp/RH or VPD value should I be following for maximum CO2 efficiency? .. and for how many weeks in flowering? As I understand at one point RH should be...
  4. Helmut79

    If watering more often, should I cut down on nutes (ppm) ?

    I've been following a feeding schedual that has worked very well so far, but now I have done something that few of us have, I've made an upgrade on my lights which has increased the light intensity to the extreme. So far it was one 1150W papillon e-light per 5x5 feet (1.5 x 1.5 meters), but now...
  5. Helmut79

    Cleaning reflectors with 99% isopropyl alcohol?

    Can I clean reflective part of the reflector with isopropanol and be sure it won't damage the surface?
  6. Helmut79

    How much lollipopping is too much at once?

    My plants have grown so big that I'm getting a feeling that about 75% of them should be lollipopped to avoid getting popcorn. Will be flipping in few days, so I'd like to have some suggestions about how much can be taken at once without making them stress too much? Commonly people say not more...
  7. Helmut79

    How much does aeroponics increase results?

    This is a question for growers that grow over average results. Since you started doing aero, how big of an increase did you see in your results? It is well known that Co2 can increase yield up to 40% if done correctly. Most get about 20% increase. What can be expected when going aero, if done...
  8. Helmut79

    How much light (lumens) is needed for cuttings to root?

    I have a dimmable MH lamp and I'm not sure if I should have it on 250W or 400W until my cuttings start rooting? Does anyone know how many lumens is needed for strong rooting?.. and how much is too much? 250W seems a bit too dark for the eyes. 400W seems right, but how to be sure? The cuttings...
  9. Helmut79

    Coco vs aeroponics - difference in potential?

    As I understand, coco and aeroponics are both basically hydroponics, right? But in aeroponics the roots are basically in air which are constantly being misted with fine mist. Seems like can't get more aeration than that, which seems to be like a good thing, right? I'm questioning if aeroponic...
  10. Helmut79

    Vegging growth speed and flowering time.

    I'd like to start off with a couple of quotes: Now could anyone please tell me if there is a connection between growth speed at veg and flowering time? Or is the answer going to be that there are so many variables in plant characteristics that it's impossible to guess the flowering time based...
  11. Helmut79

    Highest gram per watt known?

    The biggest mistake was that I forgot to count in my superlumens. It's a digital ballast that could be dimmed to 1150w, but I took it as 1000w. The first half of the flowering was happening under 1000w and other half was under 1150w, so I took an average of 1075w per lamp and got exactly 1.60g...
  12. Helmut79

    What's the best reflective sheet material for the walls?

    I've heard the best stuff is some kind of white sheet. I'm trying to find it. It was called orcan or ocran or something... What you guys think?
  13. Helmut79

    How to clean a reflector?

    This is the lightning system - ePapillon 1000W My question is - which type of chemicals should be used to clean it? I want to be 100% sure not to decrease its reflectiveness.
  14. Helmut79

    Can plant tissue culture speed up phenotype hunting?

    For example, if I grow out 100 plants from 100 seeds and wish for the next grow to be able to grow out 100 plants that have been taken from the best one from those 100 seeds, then I would need to take at least 100 cuttings from all those 100 seed-plants. This is in total of 10 000 cuttings to be...
  15. Helmut79

    Phenotype hunting - vegging vs flowering

    As usually, asking before researching and shamefully still 0 books that my eyes have seen. This is a story of 100 plants that have been planted from 100 different seeds of the same strain. They are 3 weeks old and they all look different. Well, most of them do. Some are big, some are little...
  16. Helmut79

    Co2 extraction - from raw material to concentration

    I'm wondering if there would be a difference in the end product (concentration) if we compare raw material from fan leaves to buds? Making concentration from buds would certainly yield me more THC than making concentration from fan leaves, but will there be a difference in quality is my...
  17. Helmut79

    Signs of overripening - can I turn off lights?

    What if the trimming takes more time than planned? They're showing signs of overripening. Can I turn off lights and let them be in darkness and rooted for another 4 days or so?
  18. Helmut79

    The ultimate drying chart.

    As I understand there are 3 main factors which should be in perfect balance for the perfect drying: 1) temperature 2) relative humidity 3) air movement Would be awesome if there is some kind of chart for it that focuses on first two. A few examples: 1) fast dry (3-5 days) RH range for...
  19. Helmut79

    Understanding VPD chart.

    I made a new thread as I have gotten so many PM's lately by so many forum members who want to see more threads from me. I am now going to figure out what is a VPD chart and how can it be applied and where. If you have something helpful and interesting to say, please talk. I am probably going...
  20. Helmut79

    Can there be too much heat when drying?

    At what point does temperature rise over critical level while RH is high enough so that it doesn't dry too quickly? I'm just interested to know what kind of heat damage could there be done to lower the quality of the end product except too quick drying.
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