Chris1212
- #1
I have had this small sponge filter running as a supplemental filter in my 20g for about 10 months (I also use it for my qt for a quick cycle). My main filter is a penguin 150 hob.
As you can see, it is fairly nasty (in a good way)...the sponge was bright green and the matrix I put in the small part at the bottom is barely visible. Think I should replace it?

As you can see, it is fairly nasty (in a good way)...the sponge was bright green and the matrix I put in the small part at the bottom is barely visible. Think I should replace it?
