I had to dump my worm bins and start over because of earwigs. So I made a lot of tea with these castings:
1. I used a LOT of castings - I almost completely filled a 5 gallon paint strainer (lowes). I just left enough room to tie it off and let it float / sink in the water.
2. On my cheapie pump with 2 air hoses, I removed the stones and weighted them down with the ends of bungee cords.
I had tons of foam.
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