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scottonfire
- 30
- 8
Hey Scott, I am just finishing my first grow in the UC system and have had a heck of a time. You gotta watch ph mostly, in most cases if the ppm is too high the ph will drop. Also different strains act differently in the system, I mixed strains, not a good idea! When these take off get ready to switch to flower if you are in a tent!I guess my q' about understanding ppm's is, if the ppm's are too high (260) will it drop the next day and continue to drop?
That's what I'm finding as well using cultured solutions.I've been growing in UC for about 4 years now, the last 2 using CC nutes. What I've found that if you try and follow their feeding schedule exactly you will run into issues. I generally run at about half their recommended strength. When I move my clones to veg I start out using only cal/mag, Veg A&B and UC Roots. My veg system is 30 gallons so I start with 30 ml cal/mag, 20 ml A & B, 100 ml UCR. I aim for a ppm of around 180 (500 scale). This is with RO water at less than 20 ppm. For the first week or so the ppm will generally rise. Once the roots become more established it will start to drop. I generally don't mess with it unless I see the ppm rising very fast. I run this solution for the first 2 weeks or so, or until I see good growth, before changing it out and upping the ppm to around 250.
Even when the plants are at full growth I rarely get over 400 ppm. At that state CC recommends 600-650 ppm. When I've tried running that high I run into all kind of issues, both with ppm and pH, so I generally keep well below their recommendations and find my systems a more stable and generally get the desired pH rise while the ppm drops.
Using what nutes? I can't get even close to that ?I've run well over 3000ppm in UC's. Just have to keep track daily to look for pH and EC/PPM drift. Should be able to feed harder in that system than any other. Just be sure that you're keeping each plant container highly oxygenated and your temps around 62-64° farenheit
Test brix levels before you worry about strength of nutrient solutionUsing what nutes? I can't get even close to that ?
I don't know enough about the system except that it was tough to get dialed in, but once I did, it took off! I really have a lot to learn.Test brix levels before you worry about strength of nutrient solution
Thanks for sharing, being my first grow in the uc system, I had similar issues. I found it hard to find info on it.I've been growing in UC for about 4 years now, the last 2 using CC nutes. What I've found that if you try and follow their feeding schedule exactly you will run into issues. I generally run at about half their recommended strength. When I move my clones to veg I start out using only cal/mag, Veg A&B and UC Roots. My veg system is 30 gallons so I start with 30 ml cal/mag, 20 ml A & B, 100 ml UCR. I aim for a ppm of around 180 (500 scale). This is with RO water at less than 20 ppm. For the first week or so the ppm will generally rise. Once the roots become more established it will start to drop. I generally don't mess with it unless I see the ppm rising very fast. I run this solution for the first 2 weeks or so, or until I see good growth, before changing it out and upping the ppm to around 250.
Even when the plants are at full growth I rarely get over 400 ppm. At that state CC recommends 600-650 ppm. When I've tried running that high I run into all kind of issues, both with ppm and pH, so I generally keep well below their recommendations and find my systems a more stable and generally get the desired pH rise while the ppm drops.
Thanks for sharing, being my first grow in the uc system, I had similar issues. I found it hard to find info on it.
How often do you use uc roots? Thanks a million for sharing this stuff. There's not much current stuff out there and things change so much these days!Basically running a UC system forces you to constantly be monitoring "runoff" since all the solution is running through the rhizosphere and returning to the control bucket. Your ppm/pH should stay as close to stable as possible the entire time. If you're running 1200 ppm at 5.8 pH the solution should remain at those levels as the plants continue to eat. If you have ppm/ph drift, you know to adjust accordingly to what the plants are telling you they want. It's also a very quick indicator of any root issues you may have in the system as well. Temps and DO (Dissolves Oxygen) levels are just as important as well. I always try to keep my solution at 62° and top off with 5 ml/gal of UC Roots (or any other hypochlorous sterilizing agent) to avoid pythium or any other bacterial issues.
Every three days @5 ml/galHow often do you use uc roots? Thanks a million for sharing this stuff. There's not much current stuff out there and things change so much these days!
Every three days @5 ml/gal
Basically running a UC system forces you to constantly be monitoring "runoff" since all the solution is running through the rhizosphere and returning to the control bucket. Your ppm/pH should stay as close to stable as possible the entire time. If you're running 1200 ppm at 5.8 pH the solution should remain at those levels as the plants continue to eat. If you have ppm/ph drift, you know to adjust accordingly to what the plants are telling you they want. It's also a very quick indicator of any root issues you may have in the system as well. Temps and DO (Dissolves Oxygen) levels are just as important as well. I always try to keep my solution at 62° and top off with 5 ml/gal of UC Roots (or any other hypochlorous sterilizing agent) to avoid pythium or any other bacterial issues.
He's using h2o... ahah :)Using what nutes? I can't get even close to that ?
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