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I have an awesome little petstore betta named Scurvy Jack, and I've got some questions about territory or moodiness or whatever it turns out to be.

Anyway, when I first got him, he was housed with two panda cories. They got along just fine-- Sometimes he'd get curious and nose at them, but no problems.

Fast-forward, the cories are dead, and due to a very long story I needed another spot to place an Oto. I figured since he'd gotten along so well with the cories, he'd easily deal with the smaller oto.



Bam, not just nosing anymore, chasing and harassing and flat out mean.

Oto's gone, here's the question. Will Scurvy Jack be this territorial from now on? No more algae eaters or little critters on the bottom? I was thinking he accepted the cories because he was introduced to the tank with them. Any response is welcome.

I had that problem as well. Originally in my 29g, I had one male beta (J) alone for about 3 weeks. after that I had split the tank in 2 and another male (Shaggy) on the other side of the divider with some tiger barbs. well J knew something was there and wanted his space back, all 29g of the tank.. Shaggy could have cared less. Well I had problems from the barbs, and ended up losing J, shaggy got his own 5g tank for a bit. attempted to add the remaining barbs and he went nuts.

so i'd agree with you. when they claim it, its theirs.

can try the same tricks people use with cichlids. remove the fish, change the entire tanks decor around, add the new fish and let them get adjusted and find all the good hideing spots, then add the betta later. could try hrs, could try days. depending how determined and stubborn he is about territory he could be fine for a couple days then decide hes had enough or never think twice and could careless. fish are kind like people on a subway, can freak on ya at anytime for no reason

Interesting way of putting it. X) No more tank buddies for him for awhile.

Thanks!

and yet again, i had this problem again. this past wensday, i got 2 Shark Catfish and one Crown Tail Betta, and they get along great. but friday i attempted to add a Chinese Algae Eater and the betta went nuts. he stayed in the bag the whole time and during that time, the beta was flared up the entire time. did not want him in the tank. i had thought about rearranging the tank, but i had just did that and didnt feel like spending another many hours.