Please help, what started great started taking a turn for the worst

[Dank1231]

My plants are all auto flowering AK 49. They are from 2-3 weeks old. I have them in FFOF soil and started giving them "Fish Shit" Soil Conditioner" only last week. I have a 1800 watt LED light over them with a bag of ExHale CO2 in a bag. There is a fan keeping the air circulated. I'm holding off on the nutes I bought for another week.

The problem is that there are yellowish spots all over with holes and leaves literally breaking. What is it and what can I do. I have the light at 24/0, is that the problem heat stress?

 

[MrSauga]

I'm not sure what the conditioner has in it but the FFOF would have enough nutrients to keep that plant happy for a long time. I don't know what the soil conditioner does to an already conditioned soil. How close are the lights to the plant? What is the recommended distance from the mfr? If too close it can cause bleaching. I think it's too young to show any deficiency's but what pH are you watering at?

 

[Chris Scorpio]

Ditto ditto what @MrSauga said

Ffof has nutes for weeks, like easy 5-6 ish

Only thing I ever added was calmag cuz I used RO water

What water ya use, and have you pH tested it

They look burnt up, I'd hold off on any additions to yer soil, and check those lights

 

[Virgin Ground]

When you water do you often get the leaves wet? I noticed in one of the pics that the leaves are wet and it looks like you just watered. If left under a powerful light, water droplets will cause burn that looks similar to this. Just something for troubleshooting purposes.