i have no large livestock so my "urban farm" is worms and beneficial microorganisms. Think nematodes would culture well in a shroom tub? im still tryna get around to some indoor shiitake logs or cakes.
regardless, one liter of vermicastings or vermicompost (not te same thing) in a panty hose will make 5-10gal of aerated tea. one liter if reg aerobic compost will also make 5-10 gal of tea but can instead can be paired with the vermicastings fora more diverse tea. bokashi can be used thesame one litet amount.
fermenting fruits amd veggies is anothetmethod of getting nutrition in a liquid form to yourplants. rule of,thumb is one kilo of,fruit amdveggie stuff that is solids can be mixed in one liter of nonchlorinated water. then add 2T molasses amd 2 T of a probiotic (not plain milk) like EM1 after activating into a bottle culture, lactoserum, kombucha, prbiotic tablets etc. seal air tight for two weeks and strain for liquids. compost solids.dilute 1:100when watering, can be refridgerated for shelf life