I have read alot of conflicting overseas info stating they need a good sized tank, I wouldn't dream of putting 12 of mine in a 2 foot tank, prior to the 18 we have now, I had a fair few in a just over 2ft tank, and rather a few got cleaned up.
A nice pair of Lelu would go nice.. they are another fish that is underated :lol:
I think alot of things come down to trial and error, sometimes things work, sometimes they don't.