thanks for sharing your info Horseluver50
It seems experience is truly the most valuable in many forms of information ;D
That's the only reason I say that not all info stating bettas cant live with one another are necessarily always true and accurate, as mine prove that a false xD
It seems as far as bettas themselves go, females are the most aggressive, as two males together in a small
containment. I have heard from successful betta breeders the only successful way to keep 2 or more males together is if theyre related [hatched and grew together] and are on a very large tank...but they also advise any regular "joe" not to do this :/
...you should go visit Betta talk . com where you'll see for yourself from a very successful betta breeder [Faith] that says it is actually healthy for bettas to flair their gills...and if done at another betta, perfectly ok.
Another site [Betta Care sheet & FAQ] also states
Bettas...flare when confronted with other bettas or their own reflection...Particularly aggressive bettas will flare at anything, including your face, a pencil, or your coffee mug. Flaring some each day is healthy for your betta, and keeps them entertained. Usually, flaring is not a problem. Some bettas may "blow" their fins, flaring so much that they tear them. If they do so, keep their water especially clean and add a pinch of pre-dissolved aquarium salt to help their fins heal. Other bettas may flare so much that they exhaust themselves. If this is the case, care should be made to reduce stimulus that causes the betta to flare.
note though that Faith reported that she has two males living beside one another, in sperate tanks, that flair at each other all day long...yet are perfeclty healthy.
So I wouldnt worry too much about things like putting a divider between them, not having reflective marbles / rocks, ect ;D I would only be conserned about it if you notice that he dose in fact do it non stop, and is making him worn out.