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I hope you're talking about outdoor. Amazing amount of crud in the our outside, depending on where you're located. I've had indoor with that much crud on it from other people, I've used HEPA filters since my second grow. "Secrets to Trichome Dense Cannabis" You can find it on amazon and nook...

R/O and GH 3-part? You don't need any pH down, simply use less Silicon. Try this at the start of your next flowering DWC, or other roots-in hydro system... (roots-out systems are slightly different) Mix nutes and water to desired strength and pH'd to 5.4 Add liquid silicon until your pH is 5.8...

This is my understanding of cannabis. I spray nothing in flower, soaps in veg, water and isopropyl in veg for mites (Keep it OUT of the root zone). I have a problem in flower? Guess what, it either completes without spraying or I tear down and start over. In my book there is no *fixing* a...

Working your way up is a great strategy. :) Your plants will thank you, I'm sure. Douglas

Thank you. I look forward to actual studies being done. At this point I simply have two advantages going for me. One, I'm extremely sensitive to taste, smell and touch. Two, I came across cannabis that was stupendously higher quality than mine, 8 years ago. Been a long road since, I figure I'm...

Potassium is considered responsible for quality smoking characteristics and sweetness in tobacco. I find the same is true for cannabis. Read up on it in the tobacco industry. Silica? Ever smoke a microchip? That's silicon. The more silica/silicon you use during flower, the tougher and hotter...

TYVM :) Spent a lot of time on this subject, lol, nearly been divorced several times over it. (wife gets tired of seeing the back of my head all the time, sitting at a computer looking up new stuff to experiment with.) Douglas

To point out how cleanly you can grow cannabis with clean nutrients. No, most plants are not dynamic accumulators. Cucumbers do not absorb excess nutrients and make cucumbers out of them, at least not nearly to the same degree as dynamic accumulators do. Organic and Hydro grown plants both look...

wow, it's been so long since I've been to that site I didn't recognize it. That's actually the full thread, completely different theme threw me off. That and the 'printable' version link doesn't work. Glad it's still around. Devour that info completely, it's pretty much all there. The only...

The original link is dead :( http://www.cannabis-world.org/vanilla/discussion/892/ask-lucas 99% of the other places to look it up, have the wrong information. The OG GrowFAQ is responsible for most of that dis/mis-information. I'll have to see if I can find the copy I made of the original...

Keep increasing the amount of air power, it'll happen. It always does, unless you don't have CO2 in your room air, in which case your plants won't live. :) Douglas

I joined RIU because I'm tired of people handing me low quality bud. I'm tired of dispensaries putting their bud on their top shelf, when all of it belongs on their bottom shelf. I live in colorado, people hand me bowls of bud all the time. It's gross. People lack awareness of true quality...

BAM! :D

Pharmaceutical grade means 99.9% free of contaminants. I never said it was organic, I said people call it organic. I've been called a liar when I tell them it's hydro. Multiple times. Dynamic accumulator? Heavy Metals http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4235884/ Potassium, Silica...

Read your plants first... Once your plants are a medium green and growing super quick and healthy, THEN take a reading. Cannabis is extremely diverse. Dark green, soft leaves are way too much nitrogen/nutes, very light green with discoloration on lower leaves is a sign of not enough. Let the...

I use a modified Lucas formula in my DWC. The main issue I've had with additives are the same as others have mentioned, most are garbage and some mess with the pH. Additives I use with Lucas Formula Epsom Salt A lot of strains are mag hungry (No need for cal-mag, there's plenty of calcium and...

Hydro roots need a bit of protection. I've moved a lot of plants into soil from hydro and I've found a way that works rather well. I use the powdered soil from the bottom of a bag of soil. I make sure every root is covered with a thin layer of that powdered soil. Then I carefully transplant...

+1 Lucas Formula was designed to be used with a full and cyclic pH swing and ONLY R/O water. Cannabis is a dynamic accumulator and that 250ppm is heat, bad flavor and darker ash (unless it's all calcium, then you get bright white ash). Only plain R/O water is used to top off the reservoir...