I had ruled out live rock due to what I expected to be 'inherent instability'. I guess I could use some LR after all.
The difficulty is in buying such small quantities of live sand and LR.
I may have to set up two. :P
I found the link for a guy's Amano breeding setup-
He stirs it once a day with a spoon, but other than that, he "grows them with his arms crossed."
No frequent water changes, no filtration (just an airstone), no feeding. He stimulates an algae culture, and lets it act as the filtration.
Very peculiar, although it's ugly. :P Caridina Japonica Online
I don't think I should keep nerites in there though... The phytoplankton will settle on the ground and the nerites may eat it.... Plus they might not have enough food.