I am trying to start a colony of California black worms(Lumbriculus variegatus) In my soon to be 10 gallon sump for my 20 gallon long river tank.
What I am trying to find out more about is:
-what is best to feed them?
-what substrate should be used, (everything online says paper towels but I'm not going to pick single worms out of mush to feed, that is total crap)
-how much or little flow can they handle
-how far from the surface can they be, (is about a foot okay?)
Thank you in advance for your help,