Hi! So I had one of those plant/leaf backgrounds for Calcifer's tank to make it look nicer, but I got bored of it and replaced the background with a postcard collage. This was about 2 weeks ago and I figured he'd be used to it by now but he still flares at it occasionally. Sometimes he just stares at it and sometimes he flares, he doesn't attack it, just flares. Overall he seems healthy and I feel like the background gives him some entertainment. On the other hand I don't want him ruining his fins (his tail fin is making good progress) and I don't want him getting tired or stressed (he doesn't seem stressed but he might be. I don't know). Can I leave it or should I take it down?