Cal/Mag Issue?

Thanks for taking the time out to look at my post guys. I did use an old bottle of advanced nutrients cal/mag and it is 2-0-0. Looking back, probably not the brightest thing to do, but live and learn, right?

Anyways, not this brings up the question. I just watered on Friday, the pots being so big, I typically wouldn't water for at least until next Friday. That being said, should I still flush them tomorrow and find a more suitable cal/mag product? Also, I haven't ph'd my water up to this point, I checked it with a cheap meter and it shows it being around 7 out of the tap. Should I try to PH down a bit just to get it to 6.5 or maybe a bit less?

I am growing in organic soil and outdoors, both of which I have never done before. Everything was fine and moving right along until I hit about the 3rd-4th week in flowering and then, well here we are. I have had plenty of success in the past growing indoor in coco with a controlled environment and controlled nutrients, but this outdoor thing is taking for a ride...lol I thought outdoor was supposed to be easier...lol Cheaper, definitely, easier...that's debatable.

Anyways, let me know what you guys think I should do at this point and thanks in advance!

Questions: p.h. Of water. Do you flood and flush or just splash a little? It sure looks like potassium def. But this could be due to salt buildup too. Id say, dont panic, flush a little extra p.h. Correct water this week and go.with 1/4 strnght nutes again. They havntbdrank that fire water before. Go easy.

Thanks perplexus. I think I am just going to flush and then finish with some water with epsom salt. Any idea how much epsom salt per gallon of water?

So, after a flush with ph'd water and a light feeding of some epsom salt and molasses, they seem to have stabilized(or at least it doesn't look like it is getting worse to me). I have attached some pics. Also, when I was flushing I had dug a little 2 inch hole in the pots with my hand and noticed some little flea size bugs hopping around. I assuming, since they were under the soil, these must be fungus gnats. Is it safe to assume these are fungus gnats and take the appropriate action to eliminate them(whatever that may be?).

Yes those could be fungus gnats, they lay eggs in your soil and the hatchlings feed on the fine hairs of your roots causing problems that look like deficiencies or however it is spelled......If they are fungus gnats, you shd see them flying around if you bump the container, give it a few hard knocks on the side of the pot and see if anything flies out of soil.You got to look hard but sorta like flying fleas when they smaller, adults sorta look like a black fly crossed with a mosquito.