Try a dome until you see bumps then you can look at removing. You don't need it after that if your humidity is decent. I wouldn't even bother cloning if under 50% not to say it can't be done but why not make conditions with the best chance to succeed. Just because it can be done doesn't make it ideal. The issue with a dome comes if you leave it on to long after showing root and transpiration picks up a bit. Should be opened daily and leaves should be kept from getting wet and touching. I think temps of 75-80f would work best. I do my clones at 80f. I would be using a sterile practices. That means h2o2 or other. Those temps should give the fastest rooting but also fastest reproductive rates for pathogens and bacteria. That's why sterile.
Tbh that was probably the reason they just flopped over after a week and a half of standing. They got an infection something like root rot. I highly doubt it was the temps after almost 2weeks.
Temps are definitely an issue if your not sterile or running beneficials because of this. No different than any hydro grow system. You always see ppl say you need to run 68f or cooler... Well all that does is slow growth of the plant and bacteria or pathogens. I ran my hydro 72-74f with beneficials and never issues.
The important part is preventing infection and giving the best environment we can for the best success rate.
Should be no issue cycling the pump but I would probably do 10-15 on/off cycles. Just my opinion.
The thing about no domes is maybe someone has 70% Rh and maybe someone else has 20%. Personally I don't feel you can blanket say you don't or atleast would not benefit from a dome. I can blanket say a dome will provide adequate humidity to reduce stress on the cuttings. They may root with or without but the fact is they do better in high humidity.
Also just a hunch here that's pure blue light.. change to red if your going only one color.
Grab some h2o2 for sterile or something like
hydrogaurd if you wanna go beneficial. Change your light. Try a dome for the first 5-6 days. Keep the cloner in over 50% humidity after that if you can.
Just my opinion
