I have 2 20lb CO2 tanks that I alternate to save on trips to the store. They each last about a week. I have the regulator plugged into a PPM meter keeping the CO2 level between 1200-1500 PPM. I have the regulator plugged into a timer so that the CO2 doesn't run when the lights are off. And it is also off 15 minutes on either end of when my 8" fan exhausts the room a few times during the day. I have the CO2 flowing through a halo that is zig zagging across my ceiling.
Short of a completely sealed room with AC that's just about optimal for co2 enrichment, I'm looking forward to seeing how they progress...
Disclaimer: I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
The controller helps with waste and it allows you to keep a set PPM, it's not mandatory, of course, but it's worth the investment, imho.
Disclaimer: I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
i don't use a digital CO2 controller, way too expensive. i have the $200 version that keeps it in the optimal range, and gets the job done very well. My room is about as sealed as possible, without going to crazy. I just turned on the UVB light today. Only about a month left to harvest. Everything running smooth and according to plan. Other than that there is not much new to report. I have included some new pics and i try to use the same bud and wider view so the progress can be compared over time.
i use the 800W solar storm. Good call on the light bleaching. I couldn't tell without bringing in a flashlight. My room has no regular light bulb and with the LED lights it is kinda hard to tell true colors. I capped off the top of the few buds that were bleached and moved the light much further away. It is the second week of adding my Shooting powder and I'm excited to see what the next week brings. The UVB light seems to working as advertised as the buds seem to be showing a lot of trichromes. Enjoy the pics.
I'm noticing some upturned leaves in your pics now. That's usually a sign of high temps (heat stress). Maybe maybe that's fixed now that you've moved your lights up... how many inches from the tops of your plants were you keeping the light?
I wouldn't worry too much about it as long as your temps are good in your garden (below 82F at the canopy is the norm). I sometimes sacrifice a few bleached tips in order to get the rest of my plants closer to the light.
I am currently 14" from the tallest bud and 18" for most away from the light. I was probably several inches closer before. My room generally stocks pretty cool. I have my A/C programmed to only come on if the room reaches 82 degrees.