My DIY Sponge Filter

[Clay]

I would skip the green sponge and go natural. I would also go with a thicker sponge for more surface area. You can also just run the airstone down the pvc without the need to drill a hole for the airline tubing.

Creative though!

 

[kmc150]

are you suposed to ccap the top of it or no

 

[knifegill]

And isn't that a little fine-pored? Does it clog faster than normal?