Eheim Filter Media Net Bag 2L

The fine mesh on this bag holds my small ceramic rings perfectly without any bits escaping into the tank. It's sturdy enough to handle regular rinsing during water changes, and the 2-liter size fits nicely in my canister filter.

I was worried about loose ceramic rings clogging my canister, but this fine-mesh bag keeps everything secure while still letting water flow through easily. Holds a full 2 liters of media without any strain on the zipper, which feels solid.

Finally a bag that doesn't shed threads into the tank after a few washes—the fine mesh held my ceramic rings tight and the drawstring stayed secure for months. It fits the full 2 liters easily and rinses out clean in under a minute. My water's been crystal clear since I switched to this one.