# Fluval U4 Filter Media Value Pack, model A350

Fluval U4 Filter Media Value Pack A350 is a replacement-media set for Fluval U Series internal aquarium filters. It combines biological Biomax media, Bio-Foam for trapping debris and a Poly-Carb cartridge with polyester and activated carbon layers. The listing says one pack provides media for up to six months.

- [Original product page](https://bargainpostbox.co.uk/product/fluval-u4-filter-media-value-pack-a350)
- [View offer](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- Market: UK
- Language: en-GB
- Currency: GBP
- Model: A350
- Category: Pet Supplies > Aquariums & Terrariums
- Price: 12.99 GBP
- Previous price: 20.99 GBP
- Discount: 38%
- Price checked: 2026-11-13T06:01:27.008Z
- Rating: 4.6 / 5
- Reviews: 161

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Biomax is described as supporting beneficial bacteria growth and the natural nitrogen cycle.
- Bio-Foam traps larger waste and debris while maintaining water flow, according to the listing.
- The Poly-Carb cartridge combines a polyester particle-trapping layer with activated carbon.

## Pros

- Includes biological, foam and combined polyester-carbon media for routine Fluval U filter maintenance.
- Media types have distinct listed roles, from catching debris to supporting beneficial bacteria.

## Specifications

### Compatibility and use
- Designed for: Fluval U internal aquarium filters
- Specific uses: Indoor
- Claimed media coverage: up to 6 months
### Media types and functions
- Biological media: Biomax
- Foam media: Bio-foam
- Combined cartridge: Poly-Carb
- Polyester layer: captures fine particles
- Activated carbon layer: removes toxins, discolourations and odours
### Dimensions and installation
- Weight listed: 210 g
- Package dimensions: 27.4 x 12.9 x 8.3 cm; 210 g
- Quantity: 1
### Power
- Batteries required: No
### Identification
- Model number: A350

## Before you buy

- The claimed media coverage is up to six months, not a guaranteed replacement interval. The listing advises replacing media regularly, so actual timing may depend on aquarium conditions and use.

## A good fit for

- Fluval U Series internal-filter owners seeking a replacement set with biological, foam and carbon filtration media.
- Aquarium keepers who prefer one pack containing several media types rather than purchasing each separately.

## Less suited to

- Owners of filters outside the Fluval U Series unless compatibility is confirmed.
- Buyers seeking the internal filter itself rather than replacement media.

## Customer feedback

Customer feedback describes the media pack as good quality and good value. That may matter to buyers looking for a consolidated replacement set, though customer impressions do not establish filtration performance or the claimed replacement period.
- Positive themes: Customers describe the pack as good quality.
- Positive themes: Customers consider it good value for money.

## Frequently asked questions

### Which filters is this media pack designed for?
The listing identifies it for Fluval U Series internal aquarium filters. Confirm the exact filter model before ordering if compatibility is uncertain.
### What media types are included?
The listing describes Biomax, Bio-Foam and a Poly-Carb cartridge with polyester and activated carbon layers.
### How long does one pack last?
The listing claims media for up to six months and also advises regular replacement. Treat six months as a maximum claim, not a fixed schedule.
### Does this pack include a Fluval U4 filter?
No filter is listed as a pack component. The product is described as replacement filter media.

## Alternative options

- [Aquarium Media Kit Compatible with Fluval U4 Internal Filter A480 \| 9 Pack \| 4 Foam Pads, 4 Poly Carbon Cartridges, 1 Ceramic Ring, Fresh/Saltwater, 3‑Stage Filtration, Improves Water Clarity](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [FLUVAL U2 Filter Media Value Pack, Brand, Genuine, Complete Internal Filter Kit](https://bargainpostbox.co.uk/visit/fluval-u2-filter-media-value-pack-a348)
- [FLUVAL U3 Filter Media Value Pack, Brand, Genuine, Complete Internal Filter Kit](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [Fluval Genuine U4 Underwater Filter Media Poly/Carbon Cartridge 2pk](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [Filter Media Kit Compatible with Fluval C2 \(30 Gal\) 5-Stage Power Filter \| 13 Pack \| Activated Carbon, Ceramic Rings, Bio-Screen Media, Poly Foam Pads, Fresh & Saltwater, 4-Stage Filtration](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [Filter Media Kit Compatible with Fluval 306/307 Canister Filters \| 38 Pack \| Bio-Foam Max, Activated Carbon, Sponge Filter, Ceramic Ring, Fresh/Saltwater, 6‑Stage Filtration](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [Filter Media Pads Compatible with Fluval 306/307/406/407 Canister Filters \| 24-Pack: Ammonia, Nitrite & Phosphate Remover Pads plus Water Polishing Pads for Mechanical, Biological & Chemical Filtration](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [Aquarium Media Kit Compatible with Fluval U2 Underwater Filters \| 9 Pack \| 4 Foam Pads, 4 Poly Carbon Cartridges, 1 Ceramic Ring, Fresh/Saltwater, 3‑Stage Filtration, Improves Water Clarity](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [INGVIEE Pack of 12 Compatible Foam Filter Sponges Replacement for Fluval U4 Aquarium Filter](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [Borlech Aquarium Filter Media Sponge Pad, Multi-Layer Foam Filter Floss for Fish Tank Filters Accessories \(40 x 30 x 1.5 cm\)](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [38 Pack Aquarium Filter Media Kit,Compatible with Fluval 306/307 Canister \| Includes Replacement Bio-Foams, Activated Carbon & Ceramic Rings \(2 Sets Filter Bio Media Maintenance Bundle\)](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [32 Pack Aquarium Filter Media Kit, Compatible with Fluval 306/307 Canister \| Includes Replacement Bio-Foams, Activated Carbon & Ceramic Rings \(2 Sets Filter Bio Media Maintenance Bundle\)](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)

## Add-ons

- [FLUVAL U4 Internal Filter, 240 Litre](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)
- [Fluval U4 Internal Filter Foam Pad](https://bargainpostbox.co.uk/visit/fluval-u4-filter-media-value-pack-a350)

## Images

![Fluval U4 Filter Media Value Pack, model A350 — 1](https://bargainpostbox.co.uk/i/pISshT3vvhhlJ2E_2GvarR8NOfQtRnooZ6PbNSqPSSyfxuV99IAdq8ILWPOMuwvD6cj5cAvXD1dXeM6EbsqXfcs5_lokJYzGecglLune3r43UpkSJ6bz-dQj.jpg)