in 5 offers
The lowest price for Fluval Flex Filter Block Replacement Foam right now is $12.00 at Bespoke Aquariums, compared across 5 retailers.
The all-time low was $12.00 on 12 Sept 2026. That's the lowest price we've ever tracked — a great time to buy.
Prices last updated 12 Oct 2026.
Fluval Flex Filter Block Replacement Foam
Last updated at 12/10/2026 19:25:05
Fluval Foam Filter Block for Flex 57 123 Aquarium
Delivery between 21–23 Oct $12
Fluval Flex 57L Foam Insert (A1375)
Delivery between Wed – Thu $10.67
Fluval Flex Replacement Foam | 34L 57L & 123L Filter Block Flex 123L
Free delivery between 13–20 Oct
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Fluval Flex 57L Replacement Foam Block (A-1375)
Free delivery between Wed – Thu
Fluval Flex Foam Filter Block, Replacement Aquarium Filter Media, A1375
Delivery $28.73
| Filtration Capacity | 57 l |
| Product Type | Filter Block |
| Tank Size | 57 L |
| Water Type | Freshwater |
| Animal Type | Fish |
Fluval Foam Filter Block for Flex 57 123 Aquarium
Delivery between 21–23 Oct $12
Fluval Flex 57L Foam Insert (A1375)
Delivery between Wed – Thu $10.67
Fluval Flex Replacement Foam | 34L 57L & 123L Filter Block Flex 123L
Free delivery between 13–20 Oct
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Fluval Flex 57L Replacement Foam Block (A-1375)
Free delivery between Wed – Thu
Fluval Flex Foam Filter Block, Replacement Aquarium Filter Media, A1375
Delivery $28.73
| Filtration Capacity | 57 l |
| Product Type | Filter Block |
| Tank Size | 57 L |
| Water Type | Freshwater |
| Animal Type | Fish |
