Fluval aquarium filter Foam Block 2pack 204/205/206 and 304/305/306 $2.89 also 404/405/406 2 pack $2.89 amazon prime

2 separate links for the different Fluval filters make sure to buy the correct size.
Fluval Foam Block 204/205/206 and 304/305/306
https://www.amazon.com/Fluval-Foa…657&sr=8-2
Limit 3 (2) packs per account
Fluval 404/405 Foam Filters 2 pack also fits 406 according to the question and answers section on amazon
https://www.amazon.com/Fluval-404…928&sr=8-3
Limit 3 (2) packs per account