It’s starting to perplex me. Before you just shoot from the hip and make a ramble please either know for certain what you are talking about or let a pro chime in. I’m not a rookie myself.
These are the test genetics from fast buds that are PHOTO PERIOD PLANTS
Originally I thought it was wind burn because
It was the closest plants to the fan. I adjusted it a week ago
Medium Coco 6” pot pro system from floraflex
Nutrients floraflex b1-b2 + ghe Cali magic and flora micro
PH 6.4 @1000 ppm, temp 70°
12/12 week two of flower
Daytime and night time temp 75
No co2
Lights are HLG 260x2 at 26” above canopy par reading 55,000 lux
@PharmerBob, so I flushed them with tap water that was PH correct to 6.4. While doing so I captured the runoff and it was 300 points higher in ppm than the water going in which is odd because I thought coco wasn’t supposed to hold nutrients. I drained and refilled the reservoir were a little high at 1300 so I hosed it out a second time to make sure it wasn’t hanging on to residual crap.
I’m using the new floraflex powdered nutrient line which doesn’t seem to have salt buildup like the rest but it’s by weight. I’m using the b1 & b2 bloom nutes at A little less than 2 grams per gallon. I put 6 tea spoons of cal mag and got it to 6.4 @868 ppm
These nutes have 14% nitrogen in the bloom
@PharmerBob the lines are only 5 weeks old. I change them almost every grow. @Watt-Sun I adjusted the fan. Did yours ever come back? @dbrn32 75° with a 46% RH pretty close to in the ballpark. I knocked it down to 72° to see if that makes a difference. I will note that while I was out of town my trusty assistant unplugged the heater so it was 71° during the day and I found a low of 63° registered at night so maybe they don’t like the heat now?
My vpd chart is supposedly corrected for white leds, and has correct rh at 75f for early flower to be around 60%. Are you setup to bring rh some? Would be worth trying if you can.
Since your in coco and your in flower , shouldn’t your ph be 5.8 or close to it…?
I think the cold temps and the fan blowing directly on them was your culprit…
Should bounce back if that was the case…