Help.

Currently i have had a problem with my marijuana plants, i went away for a weekend(3 days) and my plant has shown difference in the leaves, i also told my friend to water it while i was gone. and there is a change in the way the ridges on the leaves look, and the stems dropped down what's wrong with them?

What's wrong...hmmm ..don't know.
Pictures would help.

Hope these are viewable

It looks like a ph problem to me.Quickly flush it with ph water and hope for the best.The dead leaves will not repair, Instead the plant will grow new leaves and the dead will fall off.

Ph water?, so bottled water?

Distilled water should be fine