Root rot ??

[Autogrowercanada]

Here are the plants showing problems .. I am thinking root rot although I could be wrong ... I water when dry and don't over pour. (This isn't my 1st bbq)

Using at the moment :
Grow Micro Bloom - Ph Perfect
B-52
1/2 strength roughly

 

[Chester]

I can't say that it's a Calmag deficiency but I notice you don't list one ... Most autos need added Calmag ... They may be a little hungry too ...

 

[derek420colorado]

Yeah I don't think it is root rot, it looks like a Mg def to me but it doesn't seem to be an active deficiency because it is very spotty that is unless you see it getting worse in that case I would add Epsom salt to your nute mix next time