Fin Nippers?

Change of plan, as there always is, i was going to keep rainbow fish, but the ones i like really are too big for a 4' tank if i'm honest, and would probably be grumpy with Congo Tetras, SO! i'm going to have a lovely big school/shoal of Congo Tetras, BUT! are either, Zebra Danios or Penguin Tetras in your experience fin nippers, if i had 10 or 12 of either too? ( i will be having some corys at last too)

The profiles on this site and on another, more complete, site do specify that Penguins can be nippy. The normal advice for this type of behaviour is to get a large number, 10 or so, of these fish to limit their obnoxiousness. This is reported to work for some, although I have had limited success with it.

Well, good luck, ,they certainly are very tempting fish!
I'd be interested to know if they are actually locally bred, very few fish are bred locally or even in the UK, most are imported from large commercial fish farms in south-east Asia, much cheaper to breed and grow them in countries where they can be bred without any need for heat! Some also come from eastern Europe, but there seems to be very little commercial fish breeding in the UK, apart from small-scale specialists for the more unusual species.