hey man, liquid seaweed doesn't have any microbeasties but it's full of good stuff. all of the trace minerals and vitamins and amino acids are in there.

i use maxicrop soluble powder which i'm sure is similar to the liquid they make. i feed it every time i transplant since it helps them through stress. it's best used in small amounts throughout the growth cycle instead of in big doses a couple times through. it's also great to throw in a compost tea.

hope that helps