That is the filter I use on my Quarantine and I like it. It has a little surface skimmer on it as well. But there are definitely cheaper options but this is one that you can continue to use everytime you need to set up a quarantine. You can also just keep buying sponge filters for cheap and use them or get a sponge filter that you can buy new sponges for over and over. I have both but use the TIDAL filter and save the sponge filters for emergency.I like the idea of extra space in the back!