Oh no, that's not good! Shoot I think you have a eutopian def. I think you need to sprinkle some pixi dust on it. Then hop up and down 5 times and blow on the leaves.
when they were in 0.5l pots everyday, because, the soil got dry. Yesterday I transfer them to 5l pots. And will water every 2 days.
they are under 400W hps
dont end up overwatering though, that soil looks like it can hold some moisture alright. its still a young plant so you dont want to over do it. also the newer growth looks to be benefitting already from the water given after transplant. what soil is it your using? also how much perlite have you got in the soil with drainage?have you got a fan on the plant and what are your temps.
good luck with it anyway im sure it will be ok.
lu