Tetra Whisper Bio-Bag Filter Cartridges For Aquariums - Unassembled Medium (Pack of 12)

very good

Great product. Easy to use and does a great job keeping the tank water clean .

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Thrilled to find this. Have no problem filling my own filter cartridges, but for the price why bother. This makes it so much easier.

Not sure why you would buy the pre-made, i mean the price difference and the amount of work .. come on haha i have a 35 gallon fish tank with 2 koi that are 3.5 and 4 inches, they are very messy fish and i have a daughter who over feeds them all the time but i this filter cleans the tank well enough where i only need to clean it every 6-8 months :)

Price is great and the product is solid. These cartridges are easy to use, easy to assemble and put into the filter. A lot less expensive than going to the pet store.

Very easy to assemble and its a great price for 12 of them. Saving you a ton of money

I was disappointed in receiving this unassembled filter cartridge. How and why would you share the aerobic frame with the other filter bags? It’s gross and unsanitary. Cheap product.

Easy to use. I only gave it 4 stars this time as for whatever reason they didnt supply the ever-clean tablets on my last purchase.

Good