Bio - bag Cartridge 1pk

These filter cartridges do exactly what they are supposed to in order to keep your tank clean.

Perfect

Great product and it arrived quickly. Remember to run under water before inserting. The charcoal needs to be rinsed off before use.

These are really good quality filters, and you can make them last much longer by getting a tub of carbon, cleaning , and refilling them. I can do this about 10 times before the filter itself starts to degrade and needs replacement. But you can get a lot of life out of one of these by reusing it.

works!