Droopy leaves in coco coir?

Is it all day or just before lights off ? They droop before lights off in veg sometimes.

probably buildup from a bottom-feed. The veins are all dark, too. Definitely some imbalances seen in the leaves, but how it progressed could help diagnose. if you are going to go soilless, and it really doesn't matter if it is coco or something else, you need to treat it like a soilless medium. The 10% runoff is incredibly important to nearly all the benefits of soiless growing. A bottom feed setup doesn't do that and reduces the benefits realized from soilless growing methods. You'll need to incorporate some incremental runoff to avoid nutrient buildup. You look to have plenty of 'aeration' amendment. with coco you only need 1/3rd of volume or so. In a bottom feed, the act of drinking ias what allows water to wick upward and maintain a certain range of moisture over time - a little ebb and flow could be invovled -- how well the wick works and other factors will impact exactly how much. If this system hasn't caused this problem before, unlikely it is over-watering. If it's not sopping wet at the bottom all the time, probably not the cause. I'd get some good runoff, maybe 20% of a normal irrigation volume relative to volum eof the pot... empty reservoir and fill with 1/2 strength and see how it does the next week. if you see any hint of deficiencies creep in, immediately empty and refill with a normal strength fertilizer dose... a quick top-down with 10% runoff before that will go a long ways to transition the medium faster to regular level dosage, too. regardless, you'll have to learn how often you need a top-down irrigation. You shouldn't have to fiddle with the nutrient dosage if this is done occasionally. once a week? once every 2 weeks? Whatever minimum amount that avoids the problem for 3-4+ months of growing. It's the incremental changes happening like clockwork over time that you don't realize is happening that catches up and causes problems down the line. Methods/procedure can avoid it / mitigate it. it's a marathon... not a sprint.

It is probably environment. Like low humidity or the vpd is off a bit

hey 👋 In Autopot systems, overwatering is always possible even if it’s not very visible from the surface, and it usually comes with root suffocation. If I were you, I’d stop watering for 3/4 days. Apart from that, they’re lacking magnesium, but that’s probably due to root lockout. Lift your pots, you’ll feel if they’re too heavy.

Calms def, as well as overwatered imo

Many different qualities/brands of Coir, can be over watered, some brands are less fibers and more mucky. and that stuff holds onto much more water. airdomes on their site said boosts of uptp 130%.... would like to see the hard proof on that. seems like a snake oil salesmen. I think you can skip that product next run.

They do look over watered, are you giving loads of Silica? Leave that alone for now if you are... Good luck

Could be phosphorus or magnesium causing the middle leaf vein turn purple due to lock out or stress. Or a cold environment.