Originally Posted by Mister Sparkle
If he only does it once in a while, it's actually a good thing. It's a state of "constant agitation" you want to watch out for!
Yes, thanks. He did seem to settle after a while yesterday, so I'm hoping it'll end up being "once in a while". My other fish didn't do it as much as this one did, but I think the other one is younger (he's only little) or maybe he's just not as territorial as this new one.
Originally Posted by xxabc
The light can reflect off the glass and strengthen his reflection, which never ceases to be a problem with me, so I can need to keep my lights on with certain conditions (surrounding areas also have to be lit, cannot be dark in that area, etc...).
Yes, thanks. It does reflect all the time. I played around with the background yesterday, took it off, tried both sides (they're different colours) but it still reflected. I know on my other tank it reflects more/upsets him more if I turn the room light off so I have to keep that on to stop him flaring - but he doesn't really try to attack himself the way this new one tried to, he just flares up from time to time. This one was really "going for it".
I was wondering whether new bettas have ever been in a tank before - if the breeders keep them in small containers and the shops keep them in small containers, it's not surprising that they get a little upset when they see "another" fish following them around when they first go into a tank.
As he settled down after a while yesterday, I'm hopeful that he'll adjust. Thanks for the replies.