DWC: New growth with burned leaves / tips

Unkraut
Unkrautstarted grow question 5y ago
Tips of new growth are burned Not only upper growth, even on the lower branches...what could it be? Lights are 40cm away RH: 60% Temp: 25°C EC: 1.3 Watertemp: 18° PH: 5.8-6.5
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Leaves. Edges burnt
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Unkraut
Unkrautanswered grow question 5y ago
Root rot was the problem
Unkraut
Unkrautanswered grow question 5y ago
There's a oszilating vent in the back giving them a good breeze...did it like that for several grows...
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Failmore
Failmoreanswered grow question 5y ago
It looks like they are burning up from heat or light but from your grow information your temps look good. I don't see any fans in there...do you have enough fans? Maybe you have hot spots from bad air circulation.
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