I had a guppy just disappear several days ago. Moved everything, looked in filter, nowhere to be found. I assumed I must have sucked it up in the Python when cleaning subtrate but couldn’t figure out how I didn’t see it. Today I was doing a pwc and cleaned the gravel a little too. This evening, I notice the missing guppy is back. Could he have survived getting buried in the subtrate and got loose today when I vac’d again? It's crazy!