brown / orange speckles and spot on leaves ? help

I have brown / orange spots on the leaves , its still in vege stage possible infestation or over watering ? need help identifying and controlling it, it looks as if its spreading.

On the picture you can't make out the small specks but you can see the big main one. was taken with my iphone

We need more info. Whats your substrate (soil, soiless, rockwool, yadda)? Nutrients? How often fed? Whats your runoff ph? Whats your temperature in the growzone? More answers would be helpful

6x6 home built tent in the attic got a heatmatt under the pots and using a 330 led , my 2 autoflowers are fine but this is a normal plant not sure what strain as was from a bag of weed , using full mix soil and just started using bio grow yesterday but the spots were there first. been feeding once a day, maybe over watered a bit though could this be the reason? there arent any insects around. there are small brown speckles on both main leaves

the main spot is raised on the under side but no markings anywhere, just on the top side of the leaves

its 2 / 3 weeks old if helps

maybe burned through a water spot? only using a led but it is powerful

It's a calcium def bro. Look into some cal mag.

cheers bro ! you sure thought yet? dark orangey speckles and the one main spot .

could i use bio bizz bloom ?

see ive looked through peoples pics of similar problems but my spots are dark, theres no yellow / light green. looks like rust lol

I also use the bio bizz Line. But I would use algamic. U can use as a foliar feed or top feed.

Take a pic with the led off.. It's hard to see in the original pic..

will do , be 5 min

looking though others i could see that it could be a cal deficiency but ill let you se the other pics first n see what you think mate , 2 mins for pic

nah..you need some cal mag

so do you rekon its a calcium deficiency ? or something else.. if i start using bloom with the bio grow do i also need to get cal mag

the tiny spots are too small to be photographed

Like I said man... Cal / mag...

you probably need to add cal mag every 3 weeks