Help pls

Highway93
Highway93started grow question 5y ago
What kind of deficiency is this? Is it dangerous for my plant? And how do I fix it? Thanks in advance :)
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Leaves. Color · Dark-brown
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Ghostguy1337
Ghostguy1337answered grow question 5y ago
Looks like maybe a calcium/mg deficiency. Do you use RO water? Maybe start using a cal/mg solution.
Highway93
Highway93answered grow question 5y ago
Thanks for your reply. I'm using from Advanced Nutrients: Micro 4ml/l Grow 4ml/l Bloom 4ml/l. Big Bud 2ml/l Rhino Skin 2ml/l Sensizym 2ml/l Bud Candy 2ml/l Every 2-3 days 1 liter for an 11-liter pot.
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