Is the filter too strong

[southern]

I'm really worried about my new Betta. I just got him today and put him in my 9L tank - it's specifically for Betta Fish, so I thought it'd be fine. The filter's been a problem, it's stopping him from swimming and he's just stuck in one corner. I turned it off, but he's still not moving. I had a Betta before and he died after just 5 days, so I'm freaking out. I'm new to all this, please can someone help me?

[flamberg]

Honestly, a 9L tank is way too small for a betta. I'd highly recommend moving him to a 5-gallon or even bigger tank. The strong flow in your current tank could be because it's just too tiny.

[village]

I'm curious, what's the filter type you're using in your 9L tank. If it's a power filter, you might consider switching to a sponge filter, which is air-driven and has a much gentler flow. This could be a good solution given the small tank size and single fish.