I'd say don't put nutes in there yet. I like using dip n gro, but a lot of the people using aero cloners don't use anything. The other reason for the plant drooping can be due to how close the light is to the plant. ONe overlooked point in cloning sometimes is light intensity. The plant can't handle a lot of light until it has roots. I also like using pure perlite for my cloning look up wick cloners. They work great as well.