Hey VaGranny hope you are well.I didn't know Cal Mag goes in water first and need to sit. So happy I selected this post to read
Thanks Bill
Calmag helps feed the nutrients to your roots but it needs time to bond with the water first.
Put it in your plain water first mix well then leave it for 10 or 15 minutes.
Then add nutrients according to the schedule.
If you set ph do it last.
Hope that helps.
Take care.
Stay safe
Bill284