toxicity? deficiency? over watered? help!

magnesium Def maybe? and I believe I've over watered... what to do about that? probably obvious but I'm just new

What's it growing in?
What do you feed it? How much do you feed it? How many PPM?
Any suppliments?
Do you PH?
What kind of lighting?
Temp/RH?

More info needed

You’ll definitely need to answer the post above me, we need more info.
that said- your plants look like mine did about 2 weeks ago. I thought pH problems, pests, mag deficiency... but no. All I had to do was feed them.
those girls look hungry.

Not the best pics but if you want more tomorrow I gotchu. The first 4 pics are from when they were at their worst. They look very similar to yours I think.
I fed a 5-3-1 (I think) and top dressed with ffof. I also threw in some broken up mosquito dunks with the top dress.

The plant in the last pic has almost fully greened back out from what your plants look like. all new growth is happy and green. Some lowers haven’t recovered and I don’t think they will.

Coco coir, 5.9 ph filtered water from my fridge,mars hydro ts2000 (375w), once every 3-4 weeks I use light organacide, 75-85°, 40-50 rh, was feeding Lucas formula but I think I over did it so I haven't feed em for quite a while so I'm sure that's it. I was just afraid I over fed em alot so I really scaled back.

BTW they are 12 weeks today so I wanna start flowering any day now bc it's a small tent and there 12 in away from my light. so how much micro flora and calmag should I feed? there in 5 gal smartpots so 3/4 gallon seems to be enough water.

They are going to, at the minimum, double in height. I would do about 2 gallons plus. Want to see some runoff.

gotcha, I do get just a little bit of runoff from the amount of water I give now so do I. still need more? Fed em 3 cal mag 4 micro and 8 bloom today they are already looking alot better

massive improvement over 2 days with nutes