I bubble 4 gallons plain water in a 5 gallon bucket with an airstone running for 24hrs to get rid of chlorine BEFORE I add the worm castings which are my sampling of beneficial bacteria.
I add 1TBS of liquid seaweed (potassium, hormones, auxins, vitamins), 4 TBS of EWC (bacterial sampling), 4 TBS of molasses (carbon source), 1 TBS of yeast extract or rice meal (nitrogen source for proteins) to the water and let it bubble loosely covered for ~24-48hrs.
I don't use a sock to hold the EWC, it juts gets in the way.
Use a hella big air pump and get better results the air ensures the aerobic bacteria take hold, what your looking for is foam collecting at the top and it should NOT have a foul smell.
I generally water everytime with this tea, it helps as a fertilizer boost by boosting the microbes that convert the ammendments in my soil, you can add high P guano to the tea for the last couple of weeks of flowering to supplement.
Simple and amazingly effective, natures perfect brew.