I've had my betta since October, but yesterday I put a black background on his tank (black binliner and sellotape!). Well, obviously now he is able to see his reflection, even when the tank lights aren't on, and he is constantly defending the tank. He's been flaring like mad and darting around, and he immediately started building a bubble nest. He now spends all his time at the back of the tank flaring at his reflection and guarding his nest. Will he get used to it, or should I remove the background? The back of the tank is already planted, and although I want to add some more plants he's still going to be able to see his reflection. Also, has anyone else noticed if their bettas are more likely to build nests when other bettas (real or reflective) are around? My boy never built a nest until I started getting him to flare recently (trying to stop him tail-biting). Now, whenever I show him his reflection he starts to build a nest or guard his nest. I guess another betta makes him competitive (or puts him in the mood
). It's kind of cute, but I don't want him exhausted from all the effort.
). It's kind of cute, but I don't want him exhausted from all the effort.
. He'd never really bothered with them before, except to maybe chase one half-heartedly if it got in his way. But the past couple of days he started seeking them out and charging at them all the time. The kuhlis seemed a bit afraid of him as well. I've just taken it down and he already seems calmer. The one good thing was that he had stopped biting his tail. I liked the look of the background, but I guess he just won't tolerate it. I really don't want the corys terrorised 