Hi David, welcome to GD and hello to your first Grow. i will follow up to see whats going on with your 3 Bagseeds. lets hope these ones are Girls.. or the most of it^^ Athos and Dr, Puf answered your Question. A few additonsfrom me
I hope you are well prepared for your grow and got some helpful Tools
PH/EC pen Ph up and Down
Thermo/hygrometer... your Humidity is higher than 8 percent isnt it=?
and in my Opinion 3 ml of Fertiliser are way to much/to early for the Girls. Its better to start with less and later. The soil should have enough food for them
And Calmag is useless if you have red stems.....( Plus this is most time in that stage strain related. For example on an OG -Kush) you will only add more N into the Plant
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