LEAVES CUPPING

i got 4 autos into a 60x60x180 cm hps 250w grow tent.Temp and humidity are generally ok(29 C and 50% RH) into my tent.Is it possible ,my plants to get burned from the oscillating fan or from inline fan?My leaves are cupping.What should i do?

Have you fed them anything?

no

What soil or medium are you using? Is it the first time you used this same soil or was it used for a prior grow?

You may need to lift your light higher, or reduce the temperature generally.
Cupping is the plants way to reduce water loss and/or heat impact....

sworth said:

You may need to lift your light higher, or reduce the temperature generally.
Cupping is the plants way to reduce water loss and/or heat impact....

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agreed cupping is usually a sign of heat stress