Marina Slim Filter Carbon Plus Ceramic Cartridge, 9-count

All three of our nano tanks utilize Marina Slim hang-on-back filters. The filters work well; and this is a handy way to purchase replacement filter cartridges.

I am using these because the tank I bought uses them. I have to agree they are very easy to use and to change. Just pull them up and out of their housing and push in a new one. Makes changing the filters so simple and easy to do.

I'll tell you, Marina 10 and 20 gallon Power Filters are excellent as well as their filters. Been using Marina for about 5 yrs now. Better than a Tidal 35 and Penguin bio wheels. Quite, easy to use and the price will not send you to the poor house. I use two 20's and one 10 gal. Power Filters. I'd show you a video of them in action, but wasn't near them when I wrote this review. ⭐⭐⭐⭐⭐👍

My betta tank finally has the perfect filter and this media.

honestly don't know how well they filter the water. My fish are alive though. I rinse them once a week to remove excess algae

I've been using these for a year on my 20 gallon and still have all my fish so they must be working ;) I have a four cartridge filter so I usually replace one a week when I do a water change. I take a flashlight and look at them all, then take out the most dirty.

ok

Great product. Does everything it states the product does. Easy to use. Will purchase again.