Need help with identifying if this is a bug or sickness before it spreads

[pressplaybg]

hello all,

I am new grower and I need your help.

My leaves started developing those spots on them. With naked eye i cant seem to find bugs or mites.

As a whole the plant look healthy and 5 or 6 leaves are having such marks.

Please help me to find the problem and fight it before it gets worse.

Thank you all in advance

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[Rifleman]

It doesn't look like a pest to me, as best as I can tell from the hps lit photo it is probably a nutrient problem caused by an improper ph. A photo with natural light would help in diagnosing.

 

[ganjahmanweed]

salut suis nouveau sur ce site et suis surpris de voir des gens demander des diagnostiques sur leur plantes sans fournir aucune precision sur leur condition et mode de culture cela aiderai pourtant à résoudre plus facilement les probléme
et dur de ce faire une idée sur une feuille
bon grow peace

 

[pressplaybg]

Well sorry for the low info - you are both right.

Sadly I was at work yesterday and could not react fast and explain all info that could matter and because I am new was worried if it was some kind of bug or sickness.

So here goes the needed info :

two days ago I replaced the HPS lamp from 250 w to 400 w, but I guess this will not be an issue.

The day before I think I might have overfed them a little due to making a solution not using a measuring unit but rather with a naked eye.

The plant as a whole doesn't look stressed or looking like something is wrong with it.

Would appreciate your knowledge and help how to handle it and to fix it

Thank you in advance

So here are some pictures from about 10 minutes ago.

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[Rifleman]

She looks well other than those small spots. I would not worry about them. Keep an eye out for any progression of them. Always measure nutrients, never guesstimate. Otherwise soldier on, you're doing fine.

 

[pressplaybg]

thank you very much mate !

You calmed me a lot !

Note taken about the guesstimating =)

I understand that a little time spent right will save me a lot of time later to fix it =)