Never seen this before. Mephisto

[BigB6]

Problem: New leaf growth tips looking weird

Medium/grow method: Bio bizz lightmix, 12 litre fabric pots. Watering by hand

Feed: and supplements used: Biotabs line, 2 tabs mycrotex startrex

water source: regular tap dechlorinated, pH around 6.5

Strain/age: Mephisto double grape, 3 weeks old

light used: lumatek 600w zeus pro on 75%

Climate: 24oc 55% humidity

Additional info: I was thinking maybe it's light burn although the lights are 3ft away and the other double grapes looks perfect.

 

[BigD1128]

I had something similar happen and I was almost positive it was burned growing too close to lights when the leaves first sprouted.

 

[BigB6]

Surely it couldn't be nute burn with slow release fert