Thanks for the reply.
I had a M/F pair of kribs, who bred, leaving me with a load of fry. Unfortuantly, I could'nt deal with the fry, so farmed all but a couple off to the LFS's. Then my female krib died of HITH, although she was in a hospital tank and being treated, it got worse.
This has left me with my male krib (dad) and several male. As I'm getting a 75 gallon long tank, I was hoping to have maybe dad and a couple of his sons.
It looks like dad will stay by himself now though, as I don't want to risk having fry again!