Bleach spots - Deficiency or ?

[hightech316]

Hello Gromies.

I have a plant that is showing " bleach spots " or " Rust spots " which usually would lead me to believe mag issues?

Plants are 21 days old.
78f/60rH

Amended with Build-A-Soil v3.0 nutrients and minerals / Organics Alive .
75% pro-mix
15% compost
10% worm castings

That being said , all the other plants are in good health, perhaps a blemish. ? The spot is on of leaf top and under neath .

Thanks for input guys.

 

[Bobcat.Branch]

Perhaps a couple drops of water landed on the leaves with the lights on, and burned a few spots?

Doesn't look like a big deal at all, as long as you don't see any signs of insects.

 

[hightech316]

Perhaps a couple drops of water landed on the leaves with the lights on, and burned a few spots?

Doesn't look like a big deal at all, as long as you don't see any signs of insects.

No bugs.

Definitely have been hitting the leafs with water while feeding. Would make sense , since it's both sides & localized .

I was worried about some fungi. First time adding compost . Usually just do castings ...