Dennerle Eckfilter

[Stef]

Has anyone used this filter in anything less than 10 gallons?  
 

I have one in a 10 gal and it seems just right for the betta flow-wise. I bought another one for a 6 gal rimless cube for another betta to help with gas exchange (film). On the lowest setting, the betta doesn’t seem to like it, so I turned it off for now. There’s still a nano coop sponge in there and I don’t intend to remove it. 
 

Would you try stuffing a thin strip of coarse sponge in the output tube? Or just go with an airstone?

[nabokovfan87]

On 10/16/2022 at 4:08 PM, Stef said:

 

Would you try stuffing a thin strip of coarse sponge in the output tube? Or just go with an airstone?

You can take the outtake tube and wrap it with a piece of course foam to diffuse the output.  If you do this, you'd likely want an airstone to ensure there's enough agitation.