Review on Aquaneat Reticulated Sponge Filter Aquarium by Misty Thomsen

I bought this coarse foam filter to upgrade my Marineland Penguin mounted rear filter. Ideal for individual cutting and packaging in cavities in your filter. The foam is so coarse that water can pass through it with almost no restriction, so there is no chance of water pooling behind it and causing an overflow. I have an inlet pre-filter so I don't notice the foam picking up dirt, but I wring it out of the old tank water every week or two and it's clear the foam has a lot of bacteria living in it. I think finer 20-30ppi foam would work well for this.