[Lupin]

When articles and people recommmend a minumum number of barbs (6-8) to form a school, do the barbs all have to be the same color?

Not all barbs school. Cherry barbs are one of those that don't. They do not need to be kept in groups although they do better when kept in groups because they tend to display with each other a lot. It depends on what species you have.

Will tiger barbs school with albino tiger barbs, green tiger barbs, and/or gold tiger barbs?

Yes.

 

[Lupin]

Not sure when it comes to tiger barbs but when my lone colombian tetra was put in a tank with some praecox rainbowfish (similer coloring) he joined up with them. He never followed around any other schools of fish though including other tetras so the coloring might be more important than the type of fish.

Another popular example is the schooling of neons and cardinals.:wink2:

 

[Lupin]

most likely. in fact one of the local shops around here tends to keep them all in one tank and theyre all mixed together.

Agreed. Although I'd say it is very possible that they'll shoal as I had them before. Leopards actually do not appear to exist in the wild like the gold barbs(Barbus schuberti) and were said to be another variant of the zebra.