Your plants are like kids in Ethiopia. No food. No water.
Keep in mind that 99% of the water absorbed by roots is lost via transpiration of the leaves. With plants in those pots, you should be having trouble keeping humidity down. 43% is nothing. The "bark" is coming off because you're plants (roots) can take up water, but the soil is moist and rotting them. The rotting outer layer of the stalks is vitally important to uptake water and nutrients. You're plants are dying a slow painful death and nothing will save them.
But you can *maybe save a few clones and start over in small pot, then transplant once they get big enough. If you do take clones, don't snip the tips of the leaves like everyone does.
To clone,
- Just use Solo cups with seed starter. Put the cup on a saucer.
- Cut the drain holes in the bottom and add one cup of water.
- Cut your clone, scrape the outside off the bottom of the stem for 1 inch.
- Dip in water, then dip in rooting hormone
- *don't dig a hole in your seed starter. Just stick the stem in the soil 3 inches deep.
- 1/2 cup of water 3 days later.
- You'll have roots 7-10 days later and ready to be planted in a 1 gallon pot.
I water/feed every 3 days. This schedule permits you to be absent for up to 2 days.
I water/feed to this schedule. W D D F D D <start over> where:
W= water.
D = dry.
F = feed.
- Fertilizer -
Seedlings get - Small N, High P, Low K
Veg phase get - High N, Med P, Med K
Flower phase get - Low N, Med P, High K
You can do away with all of that by making a super soil that won't require feeding. Just water start to finish.
Easy Supersoil
https://borealcuring.com/growing_tools/super_soil.php