Originally Posted by deman3
Update to the original message is that while in the 10 gallon fighting crabs the Gourami also decided to fight the beta that was in there. The beta got his world rocked and now looks very much like the females of the species with his small fins. My cousin told me to name the beta, Kimbo Slice, because he is a big bad fighter but can't back it up. Either way I took the Gourami back to the LFS and they gave me 6 Serpae Tetra and 2 Neons in trade. This was my choosing as the selection was limited today. I think for my centerpiece I have decided on Angels.
I'm afraid you are exchanging one trouble for another.
Angels need a group also, at least 5, and that means nothing under a 4-foot (55g) tank. Please read our profile, Pterophyllum scalare.
Serpae tetra are notorious fin nippers. They need at least 8 in a group, and 8 of them in the 29g with nothing else would be ideal. This species can never be in with slow sedate fish like angels or Gourami as their nipping will be heightened; the long trailing fins of slow fish are too much of a temptation. Here again, lots of info in the profile, Serpae Tetra.
Neons are characins (tetra) so a group is also needed. All tetra are shoaling fish, minimum 6 for neons will suffice. They too can become aggressive in smaller numbers. And neons never with angels, the angels will eat them and/or the neons find their fins too tempting.
Always research the fish before considering acquiring it. Fish are creatures with traits, habits, almost personalities some would say, and they vary. Providing the correct environment (numbers, other fish, tank size, decor) will mean happier and thus healthier fish.