Is this calcium deficiency?

Tim1987 said:

Have you checked you oxygen levels?
You run dwc?
Have you had a look to see if your roots are hugging you airstones or anything?
IMHO it looks like the begining stages of rot.
Do all the checks dude.
Good luck.

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Tim1987 said:

Ok thats cool. Good news.
Did you check the net pot?
Its usually where it starts

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Cold$moke said:

Looks like the leaf is just aging to me like a senior citizen is it an older leaf?

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Joint Monster said:

Hey mate!

Yes check your containers/roots thoroughly again. I wanted to say CalMag....
....and I did when I saw it myself to.... I had some form of algae/ brown slime early in my dwc. and some of my early growth fan leaves (1st/ 2nd set) had similar appearance to your pics. The slight purplish-edges, edges of the leaves have a slight curl, and the CalMag deficiency like spots. (That problem has since been delt with, those first two sets of fan leaves still look like that a bit, but all new growth is good.)

^(Also double check your water pump/ pump-filter for anything dirty or clogged.)

Although Cold's advice is both hilarious and a very possible explanation as well. How far along are they right now?

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Tim1987 said:

It could be calcium tox. It does do it aswell.
But other than that, i think the guys are right, not to worry.

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JSB99 said:

And the new leaves do look okay. Just seems to be on the big, old leaves, and it's pretty minor.[/

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JSB99 said:

Thanks! I'll keep an eye on them. Unfortunately, I decided to grow three different strains, in my RDWC. So any variance between the strains, as far what each plants needs are, is going to be a little tricky to dial in. I'll have to adjust things without effecting anything else.

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Tim1987 said:

You're all good man.
You rock the dwc anyways.
Think it'll be fine

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