CaliRooted
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Stay in your room when lights out for 45 min....in 46 minuites you will see where the light leak is....if you do have one
Do you mean ethylene? It’s also produced by ripening fruit but it’s a feminiser rather than promoting masculinity. I was gonna say to dude who posted to try spraying optic switch/shift or dm reverse at day 7 next run. It’s ethephon, synthetic ethylene which helps ensure femininity. See if it helps. It burns the duck outta your plants but it does work and completely harmless/undetectable in the finished budHere's a shot in the dark.
Ethane gas can promote nanner production
Ripening fruit and fresh garbage produce Ethane.
I wasted hours torturing a plant to try to force my single Ice Breaker to turn hermie and produce pollen.
Abused 7 generations of cuttings with lighting shenanigans, water stress, colloidal Silver, etc
.
Finally happened when I let one go for 12 weeks in flower, then put out some over-ripe bananas for the geckos upwind of the stubborn female and bingo, nanners to burn, and viable pollen.
Ethane is colorless and almost odorless, You seem to have eliminated everything else that would affect all your plants, won't hurt to look for Ethane. See what's close to the air intake.
Aloha,
Weeze
Using tap water , 0ppm start , powering with light engergy 1000watt ( pretty standard) , new bulbs (phillips 1000watt) , not 100% sure if the cmh were in the first time it happend , running dimlux cmh315s, nanners dint seem to be in any particular part of the room ,no heaters in room , bottled co2 , no pilot lights , in coco but was running promix hp befor with the same problem , dont have mold or bugs , use predators for bug prevention and azamax if needed , havnt used aza in a year , ... I think its these brute barrels i was running , wierd for a room to run fine for 2 years , make almost no change and have consistant nanner problemsWhat kinda water you using ? Tap, well, ro? Ppm of start water? Live near ag land or recently logged area? What are you powering those 1k HPS with? Old bulbs? New bulbs? Literally only since the addition of the cmh? What kind are the cmh bulbs reflectors? Are the manners evenly distributed throughout room? More near the cmh? More so in any particular spot? Any heaters in the room? Running a burner for co2? Any pilot lights? What medium you in? What u use for bugs/molds? Lot of questions but somethings is up, the more info u provide the better the possibility you’ll get it figured out. Runnin outta suggestions here.
Running 2 315s in replacement of 2 1000watt ...i though maybe over lighting but iv ran this place for 2 years Without issue untill it just started , i dont think overfeeding is the problem , my runoff ppm and ph are very good , and some of the strains this has happend with are heavy feeders , i even backed off on the nutes but then ran into underfeeding deficiencies .. i usualy feed low and ramp up as the plats grow , and the nanners are coming in the first 2-3 weeks of flower when ppms are in the lower stagesi suspect over feeding and too much light, when you over feed you will see the classic tip burn, which is caused by the root hairs burning from over feeding, once the root hairs burn, the plant can't absorb the nutrients and it starts to show the Mag deficiency first as you can see in your pics, this also stresses the plants causing nanners.
Another thing is the change of the lights, maybe there is too much light going on since you have four 315 cmh lamps replacing one lamp? it sounds like you might have doubled your light?
maybe they are stressing with too much light and too many nutrients??
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