They do a good job

Despite the small size of this filter, it has been doing a great job of maintaining clean water, when changed every two weeks

These filters do a great job.

Good job filter

These tiny filters do a fine job!

They seem to do a good job, but you do have to rinse them well at least once a week

These don’t last as long as I thought they would; but the do a fantastic job

I use these in my fish tank and they do an amazing job when it comes to keeping the water clear.

However they do a nice job of keeping my Betas tank clean and clear.

and it does a great job

It’s easy to put in and does a great job.

They seem to be doing a good job of keeping the tank pretty clean.