I have a colony of Australian blackworms, living in an unheated tank on my bedroom floor. I just chuck some flakes in and do a partial water change every couple of days to ensure the water quality stays good. I plan to install a sponge filter and put in some water sprite, but at the moment they seem to be self-sustaining.
I wanted to do it that way so I could ensure I wasn't introducing anything into my tank as I know the exact conditions they are being kept in. Just be sure to rinse your blackworms well as they can carry/transmit disease to your bettas.
Hmmm.. Australian blackworms?? I've NEVER heard of that. are they the same as CALIFORNIA blackworms??
and a couple of more questions... what type of container should i keep them in? how deep should the water be?