Genetics. It will grow 5 finger and 7 finger leaves as it matures more. Keep an eye on it for hermaphrodite traits witch is usually how bag seed is formed.
Zoo
In flower that is high RH to be running. It will promote mold to grow inside dense buds.
I grow in hydro but my rH will go up to 60+ with lights off and pretty rapidly. Each 4x8 gets its own auto controlled dehumidifier and I hear them cycle on quite a bit with lights out.. lights on they...
I think the main reason for lowering the RH is to discourage mold & rot durring flowering. I keep mine at 40. It tries to rise when lights are out the worst.
No CO2 when lights out plants are not that active & durring lights on when running it you want your temps to be higher then normal 85f+
I've had pumps down for days. Never noticed a problem on bigger plants. What you can do is blow in them for now with your mouth if you're worried. I've done that in the past lol
I personally would use one large flower room and separate veg room. It's actually super hard to control the heat in my tents when I crank the lights up to their full 2kW. I run closed loop air cooled hoods and need a 6 inch extraction on the tent as well to keep temps down. Bigger room more area...
I was. I am actually now doing the 20% tap mix and it seems to be way more stable & now requires more pH down to bring it down witch is nice because with pure rO that I would buffer with potassium, it would take such random amounts of pH down I would always somehow over shoot.
If you plan to...
The first set of leaves are little ovalish cotyledons. What is happening here is some residual "skin" from the inside of the seed has them stuck together. Wait a day or so and if they still haven't opened you can slightly soak the top with light sprays of water every 10 min or so until you can...
I run perpetual so I have multiple 4x8s and veg tents. If you're planning to run one huge run start to finish then might as well just use one. Easier to control the entire room then a bunch of separate ones
I would stick around that ppm until you finish stretch. You don't want to stress em out durring these 14~ days. It sounds like you have equilibrium witch is exactly what you want but I have never grown in coco before. I currently run lots of blueberry pheno and it's very light feeder. I am...