Help: Plants started great but now have this

[Dank1231]

I have a pic of my set up below. I'm using 1600 watt LED grow light bought from USA. Soil is FFOF. I have a fan circulating my grow tent and a CO2 bag (ExHale). My nutes consist of A.N. PH Perfect Grow Micro Bloom. Also I mix in CalMag before the nutes. (Same Water). I stopped using "fish shit" a soil conditioner they sold me as an alternative to Voodoo Juice. The plants are AK-49 Auto flower. They are all supposed to be same strain but they look a little different from one another.

My question is.....There seems to be yellowish color to my leaves on the bottom. It only seems to stay on the bottom. Do you think it's just dages there from when I used the soil conditioner 2 weeks prior, or something else. I also just started using CalMag last week. Possible Mag Def?

 

[Chris Scorpio]

How old are they??

How much nutes are u feeding them?

 

[Dank1231]

They are approximately 5 weeks old. I give them 3ml bloom, micro, and grow. As well as 3ml CalMag. I also see a lot of pics of auto flowering plants that have buds starting already, maybe the strain?

 

[Chris Scorpio]

Did u transplant them at all??? Or is that the main soil they started in

Is that 3ml/ liter or gallon of each?
If it's per liter yer feeding g at almost 100% of manuf suggested amount which is way to much, half would be plenty

I think I mentioned it before, that soil is pretty hot, no need to add nutes to the soil for 4-5 weeks

So with the conditioner and nutes you've added a few weeks ago I'd say you burnt them with the combo of soil and nutes
Calmag would have been all that's needed for the last 5 weeks

Did u flush them like previously suggested

 

[Dank1231]

I did flush last week before using the nutes. The ml I use is per gallon. I am aware that I am supposed to gradually add nutes to the plants.

 

[Chris Scorpio]

Ok, that's good on the ml/gal then

I'd keep an eye on em, the bad leaves won't get better but new growth should be sexy and green

I've had autos go over 30days till pistols showed, one at 38 days, so probably any day now

 

[Dank1231]

Thanks for your help. Definitely appreciate it.