Newb question

Hello all. I’m a newb and this is my first grow.

I’ve bought the cannabis growers bible and Ed Rosenthals grow book and have gone from there.

Everything has been going well so far but today I came home and notice these spots on the bottom fan leaves. I have looked in the books to see what is causing this and nothing looks similar. Can anyone on here tell me what is going on?

Setup info ...

Medium
Lights
Auto or regular
Water
Nutes
Temps

Shoe size

All the important things

As above. Looks like ph problem, one leaf or a lot? It may be a one off problem that's ok now , tbh you cause more issues trying to fix problems that correct themselves ( depends on medium)stability is what your after. What's your ph level your feeding at. ?

50/50 mix of Fox Farm Happy Frog and Ocean Forest.

600 watt LED

Auto

RO water, ph’ed during watering/feedings between 6-6.5.

Dyna-Gro Foliage Pro, Grow, and Pro-tekt.

High 80s during the day but also supplementing CO2 levels at 1500. During the night is low 70s.

14 4E

It started with one leaf and then spread to a few of the bottom fan leaves.

Also, as far as lighting, there are some days I take the plant outside for sun light. Those days the temps were cool - between 73-80 degrees.

And come to think about it, this issue didn’t start (or maybe I didn’t notice) until I flushed when the plant went into flower and used a little bit of Floraclean with the water. Could that be it?

Better pic.

A pic showing more of the plant would help too.

I don't see it happening to any of the other leaves visible in the pic and it looks like damage caused by moisture more than anything else. Spray your plants? Sloppy with watering?

Real deficiencies happen to whole classes of leaves and not to just one here and there.

I think it's more a case of new parent worries rather than something to really worry about but don't have a lot to go on.

Good luck in any case.

I concur , looks like you'll be ok, just keep on top of it. Looks like a ph problem, 6 is a bit low imo, at least 6.3. 6.5 is ideal.