My mind is a bit blown.
In October I planned a tank for a friend who's house I stay at when I work. I took completely dry rock and dry sand well rinsed and added old tank water and fijimud in a five gallon bucket with a powerhead an put it in my basement garage to cycle. I changed the water once and added a little tank water at some point.
Life went completely off the tracks. And now it's June. I set up a quarantine tank last night, took five minutes. Added the sand and water and this morning I found this in the cup full of rubble.
Worms. Live worms.