Brown spots

[Redwasp]

Sorry left these out. The last pics were 1 gallon air pots. These are 7 gallon.

 

[PuravidaC]

I may have stumbled across what's causing my problem (possibly)... I had a couple of partial bags of FFOF left over from pass grows so I used the old soil for the last two grows, both show similar issues. Just read that potting soils have about a six month shelf live before breaking down. Any thoughts about this?

 

[Redwasp]

Dont think that's it. Should still be good.

 

[Chefbjy]

I've used it before after 8 months so idk. I did notice some holes in my leaves on that grow though and thought it was bugs. To this day can't figure it out why those holes showed up but I repotted in fresh ffof and stopped using ph down after transplanting and they grew out of it.

 

[strainsgrow]

This is P deficiency. I had the same issue and resolved it with some tiger bloom.