seedling - leaf curling down

Any idea what causes this? Too much water?

1 week old

250 HM

254 ppm nutrients

pH 6.5

Thanks

too much water. lower ph to at least 6.2

is that soil as your medium in a hydro?...

im not to sure if thats dirt instead rokwell...but for rockwell i would pay ph 5.6 -5.8
and your plant seems to be over-watered...soil retains alot of water compared to rockwell so i figure... so maybe thats something to look lurther into...