The microb-lift will turn the water a milky color for about 24 hrs. It's all good. The barley works more for string algae, but still adds various strains of BB for your filter.
Did the package say to use warm water when mixing? I have found it activates the barley enzymes quicker.
Looks like you could throw some Hyacinths from the other pond...
Put them in an area w/high flow. They too should have some beneficial microbes on their roots that will add to the pond. Also, having those fiberous roots will help stablize water with their nutrient absorbtion.