Repotting into larger pots with fresh soil (with less perlite) will help immensely.
Adding some soluble trace elements will help fix your plants.
Stop with the molasses, it does basically nothing and is corn flake packet science.
Give the humic acid, fulvic acid and amino acids, these will benefit your plant 10,000 times more than any sugar water (molasses).
They really need a minimum of 10 litres for autos or 20+ for photos, depending on how long you want to veg them.
18/6 is a lot healthier for them too.
Hope this helps, Organoman.