Zebras are well behaved small Loaches. They will eat shrimp. They are social, so will be happier in a group of about half a dozen. They are not such great diggers, but this can vary. I would sure go for these guys as a very good choice for tanks of at least 29 gallons. They are fish friendly. I had them with a breeding colony of Endlers. Maybe they ate a baby Endler from time to time, but the Endler colony kept growing, so if a few babies disappeared I never noticed. They definitely ate all the cherry shrimp, though. They are good pond snail predators, and I think they ate some MTS. There were still a lot of MTS in that tank when I redid it, though, so the Zebra Loaches did not get rid of all of them. There were empty shells on the surface, so I am sure the Loaches ate some of the MTS.