Sponge filter from UGF parts

[TheZoo]

It can be done, right? Just a matter of hooking up the pump to the airline w/airstone in an uplift tube with a sponge on the end, right?

If Im right, how big of a sponge would be needed for a 5 gallon bowfront tank?

 

[TheZoo]

Hmm, I think I'll take the silence as an affirmative answer and just try it. Im thinking a block of foam about 2" x 3" x 2". Enough?

 

[Rbishop]

Maybe cut some slots in the bottom of the tube to allow some draw from the sides, and a ring of sealant where the tube is set into the sponge?

 

[TheZoo]

Would aquarium safe silicone work?

 

[Rbishop]

Yes.