custom isolation trap - how does a sponge filter work

[Quatro]

Hey,

I have been thinking about making my own isolation trap (like the floating breeder traps but larger and better).  I want to make sure that there is flow happening inside and was thinking of a setup like a sponge filter.  In the following picture, will water flow in the direction of the arrows or will it have no real effect?  Thanks




[attachment deleted by admin]

[bergenm]

Yes it will work, Hagen used to have a HOB filter that ran on the same principle.

[Quatro]

Thanks bergenm.  I figured it would but wanted to check.