deficiency? Burn? wtf is this?

[corpsman]

Hey everyone, I'm pretty new to growing but have a pretty good grasp on what I'm doing....did a few successful outdoors but this is really my first indoor run..I'm vegging 3 bag seed from some really good dank my buddy gave me..found 3 seeds in the whole pound and all 3 sprouted.. so we decided to grow in my closet since I have my own place and what not...theyre.currently vegging under a 250w mh with a 15k bulb..it was a spare fixture for my saltwater tank... anyways one plant is showing some spotting on the leaves and I wanted to ask the vets what they think it could be. Could it be the bulb spectrum? That's kinda what I'm thinking

 

[corpsman]

I should probably add that I'm using mg soil (this could be the problem) but the nearest nursery is like 30 miles away.. and I'm watering with ro water I make myself. .only thing I've fed em is a little bit of fish emulsions

 

[tube dude]

It's hard to tell from the picture but it looks like it could be spider mites.

 

[wildgrow]

Cant really tell anything from that pic. Could you take 1 in natural light or take a macro?

 

[corpsman]

Alright here's a pic on normal light...it's the best I can get. Idk about it being spider mites...I haven't seen any or any webs.. hmmm maybe I'll go get a ph tester and test the soil...my gut is telling me it's the mg soil

 

[al70]

It looks a bit like heat stress, how close is your light, are you foliar spraying ?

 

[corpsman]

They're about 14 inches from the light...they have good air circulation.. I can hold my hand an inch above the plants and it's barely warm

 

[al70]

It was the curled leaf edges that made me think heat stress, calcium def can sometimes cause that also, nut those white streaks sure do look like spider mites, there's a sticky in the infirmary for sick plants with a lot of pics, have a look there, hope you get it sorted, goodluck