Dark brown/black spots?

Hey can anyone diagnose my plant problem? I thought I knew what it was but it appears my solution didnt work so here I am now. I have a picture below, some of the other leaves have more circular like spots although they're the same color. I thought magnesium def at first, then nitrogen.. fed some earth juice grow to the girls but they did not seem to react. The pH is fine.

Anyone know what this is?

pH imbalance. Something related to potassium. Plant looks hungry for micro-nutrients too.

More of the plant would help, maybe not all the leaves look like that.

Can you provide more details on what solution you tried, what you're growing in, what nutrients you're using, what phase of growth you're in. You know, the kind of things someone would need to know to help you out.

Is it all EJ? I've found Earth Juice to be a mediocre product at best.