I need urgent help

why do u think that ?? I know EVERY SINGLE plant is different like humans... same but different.... let her go,, give her a chance to breath,, looks like she just popped open??? I know they will try 100% to survive being a weed ,,try get a PH meter ,, on eBay 4 like 10$ with PPM pen too an they save u so many headaches is it in DWC?? really need PH pen otherwise she looks strong so far

m0use has given you the correct answer. And yes, DO NOT put a dome over it..........unless you want to kill it! Only clones/cuttings really need "domes" or super high humidity. Cannabis plants get all their moisture through the root system, NOT the leaves. High humidity for clones only prevent the leaves from drying out while waiting for the roots to form, it does not make water go in through the leaves and into the stem......that is not how cannabis plants work/function.

Sorry i have to add, DO NOT put a dome over that seedling. DON'T That's absolutely terrible advice. You are sure to kill that seedling if you do. It has roots, it is able to absorb water through it's little tap root and subsequent root branches. Why on earth would you put a dome over it? It's not a fucking clone. Dude you gotta be careful on this question section man there is a shit load of dumb advice posted here... M0use is correct though. If the humidity is super low then it would be wise to protect it until that's resolved. I've seen plenty of seeds die because someone thought it was a good idea to dome them during the first week or 2 and then when they removed the dome they all withered and died. You don't want that.

Looks just fine to me, other than it's all wet. Don't allow the stem to get wet. Even though it's hydroponic and the substrate is sterile, the likelihood the damping off bacteria that generally comes from the soil is low, but i would still not allow that stem or the plant itself to get wet at all. Personally, i would have used a bigger cube of rockwool to get that girl established before i dropped her into a bucket with hydroton on a drip system. Less chance of failure that way. Live and learn grasshopper. We await your next post complaining about why it's not growing :D

This plant does not look like its dying. it just looks like a baby sprout with one bent leaf. Give it time it will grow. I would recommend not getting the leaves wet when lights are on as this can burn the plant. The water droplets turn into magnifying glasses and burn em like ants on pavement. Domes are not needed unless RH is below 40% When growing Hydro, you need to provide all the nutrients Micro and Macros so confirm your feed is adequate and then adjust the EC to the plants needs and stage of life. Good Luck!

" I think shes dying" hahah Dude, relax.... The time of the plant is different from ours... It seems perfect. I do suggest you growing all types of plant from seed, carrot, pepper, etc. so you understand the time of the seeds. Also put a dome over the seedling