How much calcium does marijuana use. Can it go a week without any consequence?

If I use distilled water for my hempys and add Epsom salt for magnesium. Can they go without calcium for a few days until my calmag order arrives??

well I just read the dutch master gold tips and they say do not add any cal mag supplements as our product is "choc full of them"

Another grower on a thread uses dm gold and he says he needs to use calmag so I think I will too.

read the plant my man..

yep ^^^^^^^^^

IMO - I agree to "read your plant" as stated above but the truly healthy plant is a short read. The cost of that nute is inexpensive and yet is often times, along with mag deficiencies, one of the first that will show itself as deficient. Deficient, by definition... not good enough.