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

Same Fluval quality as similar Fluval filter media. Bought these for my 406 after realizing that they were priced well below the recommended price for the 406. For the price you could use several of these bags and still pay less than the recommended slightly larger bags. Buy these instead of the larger 20g yellow sachets. Update: Large packs are back from better priced sellers. But these still work fine. I use two per side for a total of 4 per basket. Would recommend anyway.