please save a plant

Hi all...My plant is over 3 weeks old now and growing well finally. I transplanted it yesterday to a bigger pot and used fert for the first time to try and help the move go smooth. I added 1 tablespoon of fish elumins to a gallon of water, its 5-1-1. I gave it a generous amount. I have a moisture meter and it is at about 3/4 at various depths and locations. Today the larger and older leaves are darker green and drooping or curling a bit downwards. Any ideas? OverWater? Fert? Transplant shock?
thanks a bunch. i can post a pic if needed.

Oh yeah, no tip burn or yellowing, just dark and curling down, but new growth still good and growing, just a bit slower.

ffhg

possible severe overdose flush and mist leaves

hi mate, sounds like you shocked it a little, young plants are very sensetive to handling
was they watered with cold water, when i water my indoor stuff i allways use water at room temp, it dont shock as much, emagine sitting snug in a pot of comfy warm earth, then to have your feet soaked in cold water it dont make ya feel to good ehh, keep an eye on them they should pick up
.................................peace happy ...........................