weird spotting on week old seedlin

[carl brutananadilewski]

I just gave my week old seedling a feeding of 250 ppms of nutes phd at 5.8 since im in coco. But they where started in those rapid rooters and then buried into the coco as nd after lasts night feeding im getting some weird burn looking spots on the older first sets of leaves but nothing on my second set. Heres a few pics. Any help would be greatly appreciated for this novice grower. Thanks.

 

[carl brutananadilewski]

Pic 2

 

[carl brutananadilewski]

Pic 3

 

[carl brutananadilewski]

Heat stress? The highest its been is 83

 

[Fantasy Island]

Did you charge your coco with cal/mag

 

[carl brutananadilewski]

Ya with cal mag plus. I had four or three bricks and i dumped 5ml of cal mag plus in five gallons of water and let it suck into the bricks then squeezed out the water handfull by handfull. Is there a set time i should of let it sit in the water and cal mag?

 

[Fantasy Island]

Ya with cal mag plus. I had four or three bricks and i dumped 5ml of cal mag plus in five gallons of water and let it suck into the bricks then squeezed out the water handfull by handfull. Is there a set time i should of let it sit in the water and cal mag?

I don't think so. I was told told to charge cal/mag at full dose so I do at 8ml per gallon so If I were to do 5 gallons worth I would have done 40ml.

If you look at my last two grows I battled cal/mag non-stop. I was feeding at 16ml per gallon and still developed a cal deficiency. I am now feeding @32ml per gallon

This is of course if it is cal deficiency. Is there any chance you splashed the leaves with nutes?

 

[Fantasy Island]

How close are the lights?

 

[carl brutananadilewski]

Wow thats alot of cal mag! You know now that you mention it i remember wiping a few drops off the middle of the leaves but i dont remember it being all over the two leafs like those burns show.

 

[carl brutananadilewski]

My mars 2 900 is about 22 inches from the plant