Who Gives A Fish Forums

I've been thinking about changing the background on my 10 gallon tank. My betta seems a bit stressed lately, and I wonder if the black background is too dark. Anyone have experience with how different backgrounds affect their fish?

I've used both black and blue backgrounds in my tanks. The black can make colors pop, but some fish do seem to prefer lighter shades. Maybe try a light blue or frosted one to see if your betta chills out more.

Yeah, I've noticed my bettas act differently based on the background. My last one hated the black one, but the current guy doesn't care. It's kinda weird how picky they can be. Maybe try a natural-looking background with plants or something?

From a technical standpoint, bettas can be sensitive to high contrast. A dark background might make them feel exposed if the tank lighting is bright. I'd recommend a mid-tone background and see if that reduces stress. Also, check your water params just in case, since stress can come from multiple factors.

I don't know much about backgrounds, but my betta seems fine with whatever. Maybe it's just your fish?

Frosty wrote: ↑Tue Jun 24, 2025 1:26 pm I've used both black and blue backgrounds in my tanks. The black can make colors pop, but some fish do seem to prefer lighter shades. Maybe try a light blue or frosted one to see if your betta chills out more.

I agree with this. My betta was way more active after I switched to a light blue background. It's worth a shot.

I've got a frosted background on my 5 gallon, and my betta loves it. He's always flaring at his reflection, but the frosted one seems to cut down on that. Plus, it looks kinda cool, like a cloudy sky.

Thanks for the suggestions, everyone. I'll try a lighter background and see how it goes.

I've never really thought about backgrounds affecting fish behavior. Interesting discussion.

My betta's tank has no background, just the wall behind it. He's chill either way, but maybe I'm missing out on something.