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Grow QuestionsIs this mold, another sickness or a deficiency?

Is this mold, another sickness or a deficiency?

OG_Maestrostarted grow question 2 months ago

All my plants leaves have this issue? I added Calmag and topdressed, but didn’t help. Also this weird mold like stuff on the walls? 51 days old and getting 390 Watts at 50 cm. Living soil, Growbox with ac Infinity set to 75F/24C and 1,3 vpd day, 64F/18C and 0,8-1,0 vpd night

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AsNoriuanswered grow question 2 months ago

Start measuring ph.

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soloczekanswered grow question 2 months ago

If you use an humidifier with tap water the white spots on the wall are calcium oxide deposits

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soloczekanswered grow question 2 months ago

I would check the PH and EC. The PH should be between 6,0 and 6,5. The EC in flower 1,4-2,0 mS/cm. It’s look like the plants have an nutrients overage and shortage. That happens when the PH is not regulated. Some nutrients get blocked and can’t be absorbed, prallel other nutrients are absorbed in excess and the plants get „burned“.

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