This was posted as a mammoth comment by Dave de Witt but I think it deserves a post. Sounds like a labour of love.
Actively Aerated Compost Tea
It’s basically a microbe brew used for foliar feeding and enriching the soil food web. I start from scratch with 30 litres of water which I let stand over night or bubble with air pumps for at least an hour, this is to get rid of chlorine which kills the microbes we are trying to brew. Next step is to add 1tbsp molasses for every 4.5 litres of water, dilute molasses with warm water first. Next, take 1 cup of fresh worm castings or compost (no manure) for every 25L water, 1 cup is fine with 30L, a little more is okay too, but not too much. Wrap the castings loosely in a piece of muslin or similar cloth with loose weave. Suspend it in the water, just below the surface if possible.
Now, I’ve got 2 double output aquarium airpumps and have 1 airstone and