Originally Posted by GodFan
Well 3 might be suitable but they do get stressed without a school. I have read about cases were they were not thriving because of lack of the same species.
You just need to buy an aquarium with thick glass or acrylic.
How do you know they get stressed without a school? Basing that on some cases about them not thriving purely due to lack of same species? Their behavior looks to be more shoaling than schooling to me, that's why I'm asking. And I've seen many tanks with very small groups, or even singles or pairs that are doing just fine.
I'm just asking these questions because these guidelines don't always have to be on one end of the spectrum or the other. I can understand if this is one of the species that is a tight schooler that literally stresses or dies because they don't have an adequate group size. I don't think it is, though, because like I said their behavior and the information I've read doesn't lead me to that conclusion.
I was asking about the thick glass thing because the big tanks we are talking about already have thick glass because of the amount of water volume they are holding. You are suggesting something thicker than that?