Internal filter for betta

[shellyx]

Hi, looking to change my bio filter as I feel it's going to be to strong for my new betta. Can anyone recommend one? I would prefer an internal. The tank is 7g. Thanks.

55 gallon elephant nose tank.
30 gallon boraras , red longfin bristlenose, bamboo shrimp, crs,rcs and different snails.

 

[shellyx]

It's fine I've bought a Dennerle internal filter

55 gallon elephant nose tank.
30 gallon boraras , red longfin bristlenose, bamboo shrimp, crs,rcs and different snails.