Today I went and purchased the Tetra Whisper 3i. My other filter just wasn’t cutting it (TopFin Element Filter). It seems quite noisy for being called the “whisper” and I’m not sure if it’s too strong for my Betta. It definitely creates more movement and if my betta swims under the waterfall part, he has to swim pretty hard, but just in that spot. It’s a 2.5 gallon tank and the filter advertised it can go up to 3. Should I go back to my old filter?