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Extraction Fan & Carbon Filter Ducting Kit Odour Hydroponics Grow Tents Smell

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What is causing these spots?

Any ideas?

I'm guessing my pH is too high or my nutes are too concentrated.

I'm waiting for a pH meter in the mail. I have been having the worst pH meter luck.

They're about a month old and we're following the label for nutes, so I'm open to ideas.

Thanks again!

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