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Clones like high humidity, and the PH is pretty low. I would aim for 6.1 and make sure the humidity is higher. If they are rooted, they will recover, just give it time!
1.6 ec is for huge plant at the end, 5.5 a bit too low ph even for hydro, for soiless it should be 5.8-6.0
you burned her, with love should be recoverable ....