6-Pack, Size B, Rite-Size Cartridge Refills

These filter well, but I wish they were more environmentally friendly. They would be more efficient if I could clean them for reuse. They leave black specks on the fabric which sometimes get into the tank. They do a good job cleaning the tank.

Muy buena calidad y pronta entrega

Great value and functions well!

Works perfectly.

Use them in my marineland biowheel filter. Cheaper than pet store price.

excellent!

Nothing beats the OEM original stuff!

Great value

Great product and good price

It does not fit as described for my model