my experience and observation on CBS is that unless you have a large tank, they will probabl y wind up being the only ONE shrimp in there, in due time.
Now, on to the big question, how big is large. I have no idea, but IMO I would say something with several ft between them. not 3 or 4 but several.
And that may be pushing it, since there is no guarentee where each one will set up shop at and claim home.
A 125?? I would not want to try and say either way, personally. Becase if I did, that lil
[hr]
will certainly prove me wrong. So, personally I would NOT risk it.
HTH(somewhat)