auto flowering k.o. crop, gorilla glue

At the middle of week 2 I noticed slower growth and a lower leaf on the gorrila glue getting some spots. I panicked and did a transplant into my cloth 5 gallon pots, I included some great white mik. since I have watered with water only plants are growing well in the new soil. that lower leaf looks crappy but no spreading of the problem. any advice as this is my first grow. big rootz soil, 6.8 soil ph, water is 7ph, I've only mixed perlite and some great white into the pot.