Deficiency? Fungus?

[Ravel]

Having some issues with leaves. They're yellowing out excessively and have been developing brown spots, all of which are very crispy and crumble easily. The other two plants in the tent look pretty healthy and don't have these issues. All three are the same strain, DP Blueberry.

Mars Hydro TSW 2000
4x4 tent
10 gallon bags, Happy Frog
Temperature low 70s
Humidity upper 50s, sometimes over 60

I admittedly fed them on the low side, which the first two seemed happy with

Let me know what you think,

Thanks!

 

[Ravel]

I kept the pH right around 6, sometimes higher, sometimes lower. Maybe it was too low for the yellowing/browning plant? The other two look pretty solid.

 

[f-e]

Are they a lot wetter than the others?

 

[troutman]

Well for 1 thing your plants are almost done so don't worry about it too much.
Maturing plants normallyget leaves that fade, etc. I like to keep the pH just above
6 to 6.5 and try to avoid going lower than those numbers.

This video may help.

https://www.youtube.com/watch?v=ZTE-YCNWC8s

 

[Ravel]

Are they a lot wetter than the others?

That plant was actually the quickest to dry out soil wise, or did you mean wet in a different way?

 

[Ravel]

Well for 1 thing your plants are almost done so don't worry about it too much.
Maturing plants normallyget leaves that fade, etc. I like to keep the pH just above
6 to 6.5 and try to avoid going lower than those numbers.

This video may help.

https://www.youtube.com/watch?v=ZTE-YCNWC8s

Thanks troutman, I'll check that out. I think I'll keep pH a little bit higher from now on and see how that works out.

My main concern was that it wasn't a fungus or infection of any kind.