Rust spots on leaves

[Highay76]

Hi growers, my plant's have currently been in wk3 of vegetation stage, and one of them has rust spots on leaves. I tried to match it's appearance to the deficiency chart but can't be sure about the reason. I am newbie in indoor growing, this is my second run. First was without this complication. I am growing Hulk Berry from Royal Queen Seeds in Ocean Forest soil, and watering with tap water PH 6,2 - 6,5. average RH 75%, TODO GROW Thunder LED light, 5 gal SmartPot.
Can anyone advise what should be the reason and how I can fix this?

 

[hotrodharley]

Soil is little too hot. Just keep going and don’t feed anything yet. Watch your newest growth.

 

[Highay76]

I have added one more rotating fan into growing room to increase air circulation, and also bring bit more cooling air for my flowers.

 

[matakumbaPro]

I have added one more rotating fan into growing room to increase air circulation, and also bring bit more cooling air for my flowers.

I think you got it wrong. Not hot as in temperature-wise...

With "soil being hot" he meant that soil has too much nutes in it, too high EC ... and that burns plants or cause lockouts and other issues...

 

[Highay76]

Uuups, my bad. In this case I can only wait and hope that pouring just water will help.

Those leaves showing rust are being suffering, and burning. I have better insight into what is happening now.
Many thanx

 

[Renfro]

Wonder what the medium pH is running...