Review on Fluval C3 Poly Foam Pad - 3-Pack: Superior Filtration for Perfect Aquarium Conditions by Diana Owens

Does the job, good price, recommended replacement every 4-6 weeks by Fluval. Just a warning, each filter is packed in an individual bag but with a hole in the bags so the activated charcoal will leak out a bit. Mine came with a bottle of Seachem Prime and some other stuff in a big box with no air/bladder filler and the bottle flattened the box with it and everything was covered in carbon. Individual filter bags were intact, only because of the holes there is a way out. Use it with my Fluval C3 for my 29 gallon Seaclear freshwater aquarium.