Dicolored spots on new growth??

I had the beginning signs of nute burn a couple days ago so I flushed and it solved it almost immediately. I'm growing in coco/perlite and am using gh flora series. I ph my water to 6 and use calmag also. Last night I noticed some small brownish spots on new growth so I fed a quarter strength but it still seems to be slowly spreading. The discoloring in the second pic is what I'm talking about. I'm thinking maybe a calmag defiency but wanted to here from people who know more than me before acting. This is my first grow

I went ahead and watered with full dose of calmag, please respond if someone thinks my pics Indicatwith so excited other issue. They are 14 days old and I plan to start flowering I one more week. I just hope to get some yield if I can keep these plants alive. Things wbere going great but now it seems to be one problem after another.

It's hard to say without knowing what ppms you are feeding or were feeding. My first thought was calcium deficiency but since you are feeding cal/mag, I don't know.

Is there anything else in your coco/perlite?

Nope, just coco and perlite. I've been using flora micro and grow with a small amount of flora bloom. Plus calmag also. I hadn't gave hardly any calmag since my flush a few days ago so that and it appears to be a ca or mg defiency according to the charts I have looked at, ones like the chart you just put up.

I don't have a ppm pen. Guess I should probably get one. I have a friend that successfully grows in coco without one but he is very experienced also.

I've been alternating between a nutrient solution and plain water. When I over nuted it threw my cycle off. Just trying to get back on track. I went overboard. I need to remember less is more and I'm trying to practice that now. I just watered with plain water plus calmag hoping to fix my current problem. I always water to 20% runoff.

Seems to be clearing up and getting good a constant shade of green again already.

The leaves where slightly deformed and getting worse. They have straightened out in just 3 hours and the plant is looking good. This is what I like about coco, the almost immediate results you see. To anyone who is new and growing in coco always start with less and you can always add whatever you need. I did the opposite 5 days ago and am just now getting it back to where it needs to be.