12-Pack Aquarium Rite-Size Z Filter Cartridges Replacement for Marineland Eclipse Filtration Systems & Hidden Filtration System

These fit my aquarium filters for both my 2 gallon and my 5 gallon aquariums. Love the integrated charcoal and the heavy duty plastic backing. I am very happy with these filter cartridges and would buy them again.

They are a little big. The cloth/blue part is a little to big around the edges of the filter so I really had to jam it into the filter holder. I have a small tank and only have to change the filter maybe once a month and this pack will last me probably the entire year and its a good price but if your looking for an attractive fit this is not the filter for you.

Great size for miniature beta or guppy aquariums and easy to change.

These are made just as good, or possibly better than, the name brand. It has blue filter floss on one side, and that's attached to a plastic cartridge containing activated carbon and zeolite. It's nice and sturdy, and fits perfectly in my filter.I put new soil substrate in the tank for my plants, which made the water cloudy and murky. I put one of these cartridges in the filter, and the water was clear again within an hour or so. So they work super well.I love the fact each filter is individually packaged inside the box. Yes it's more stuff to throw away, but it keeps the filters from getting dust or anything else on the ones you have yet to use.

These seem to work just as well as the name brand. The fit is great and they work as expected.

Good replacement for the Size Z filters for my smaller aquarium, they fit well and so far do a good job, they have a little less charcoal then the brand name filters, but work equally well.