Sounds like its time to start adding nutes. Unless it was the cotyledons that fell off, like the last poster said, they are supposed to. The cotyledons are the small leaves that have smooth edges and dont look like pot leaves.Like the first set the plant ever grew? If so then they pretty much always die. Its normal.
Well if he used a MG soil depending on which one you used you should still be fine, if you used regular soil then maybe the nutes are gone, but like the last two people stated the first two sets of water leafs just fall off once it starts growing good luck on your grow manSounds like its time to start adding nutes. Unless it was the cotyledons that fell off, like the last poster said, they are supposed to. The cotyledons are the small leaves that have smooth edges and dont look like pot leaves.