- For AquaClear 50 and "200"
- Foam Insert traps particles and debris
- Tailored fit prevents bypass
- Economical 3 pack for serious hobbyists
- Same high quality foam as individual boxes
- it's a foam filter Review by Anthony
What is there to say. If you need these, you need them and the work. I wash them monthly and they last for several months. (Posted on 8/7/13)