they used to fight alot.. i had to split the tank in half for about a week or two. then i took everything out of the tank and they actually warmed up to eachother. last night i put the hiding spots back in and not 5 minutes later 1 come back and they each had the other by the tail.. formed a complete circle, it was pretty funnny but i had to split them apart. they havent fought since then tho.
i do. when i move into my new house im either having a "fish room" with atleast a 20' tank or im building an above ground pond with a plexi front so i can see the fish.