Leaves curling upwards, Can't figure out the issue, thank you for any advice!

Aloha, these seedlings were started about 2 weeks ago, everything seemed to be going smooth and they are still growing nice but I have noticed a strong upward curl taking place on two of the seedlings. I have more than adequate air going in each bucket, light seems sufficient for their age and there is a nice mellow air movement. PH is good and I'm keeping the PPM around 450 Any advice or tips to remedy this would be super appreciated.
Mahalo~

it looks like too much light maybe the light is bouncing off the white buckets and pumping too much into them. Are all of them doing it?

mateobeast88 said:

it looks like too much light maybe the light is bouncing off the white buckets and pumping too much into them. Are all of them doing it?

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Not all of them, just two so far but maybe a 3rd slightly showing signs. Yeah I thought that too, They are super young! Maybe I'm overdoing it?