Marijuana looks like its having a deficiency

A question from a fellow grower:

I am in wk 3 of flower looks good except 1 WW here are the pics.Any suggestions.Also some red stem?

Over watering?

My thoughts as well. Red stems are often a sign of over watering that causes a calcium and magnesium deficiency. Make sure your soil is drying enough between watering, get used to the weight of the container saturated with water and then nearly totally dry and don’t water until it is almost totally dry feeling.