Should I start the cal mag treatment immediately I just did nutrients yesterday and any suggestions on how many mls and how long I should keep up sorry for the questions im a real newb lol
Also keep your RH as high as 70 for the 1st week at least as that's how seedlings support most of their growth.
They like clones in a way. They need very little at the start. A root stim if you have it, give roots time to take hold and do their thing. So a high RH helps the young seedling take in moisture threw the air.
Yup. Too much too soon. You got nutrient lock.
Cut everything and very light diet of calmag and let her finish all them nutrients in that soil. Very light, like 200ppm .4EC. Or if your water is that that alone will do.