Rusty yellowing leafs dying

Anyone got an ideal whats going on?
Tap Water that I leave out for 12-24 hours to de-chlorinate.
Using head formula for coco which is 6ml per gallon of Micro and 9ml per gallon of Bloom.
5ml per gallon of Calmag (Just started using this 3 days ago)
PH to 6.0-5.8
Using coco/perlite
They're in 4x8 with 1020watts of QB..
Temp right now is 57 humidity, 80F.

It looks like you are over watering...

Its coco, and they're 1 gallons, they dry up the next day....

Guess not