The Top Output setting provides maximum circulation and oxygenation, the Integrated Spray Bar setting provides a gentle, even flow for planted aquariums, and the Bottom Output setting is for deep-water agitation.

The adjustable 3-way flow control feature lets you position the water flow output to meet your specific needs. The Top Output setting provides maximum circulation and oxygenation, the Integrated Spray Bar setting provides a gentle, even flow for planted aquariums, and the Bottom Output setting is for deepwater agitation. So what’s changed? The first ‘tweak’ appears minor, but is actually essential. A tag on the front of the filters, as soon as you extract them from their boxes, shows you how to remove the impeller and give it a clean. If the pictures are confusing, then you can always scan the QR code instead, and watch a video about it. Accessing the impeller for maintenance is a doddle.adjustable 3-way flow control: Top output for circulation and oxygenation, integrated spray bar for a gentle even flow, and bottom output for deepwater agitation The new Fluval U Series of filters may look the same, but there have been several tweaks to improve the design. The last tweak involves accessing the motor — which is now the same shade of blue as the internal filter chambers, indicating that it can be removed. Where the old motor was restricted by the power cable that ran up the rear of the filter, the newer design allows for the cable to be pulled from its moorings, freeing everything up.

The Fluval U2, U3 and U4 Internal filter have an adjustable flow to ensure the filter meets the needs for different aquarium environments, this consists of 3 flow settings. Top output for increased circulation and oxygenation, spray bar for a gentle flow designed for planted aquariums and the bottom output designed for deep water circulation. All parcels require a signature upon delivery, meaning that our courier is unable to leave an item without a signature. Fluval U4 Underwater Filter provides complete and efficient 3-stage filtration, including BioMax biological filtering, to create superior aquarium water quality. The U4 Filter includes practical and versatile features, making it ideal for application in fresh, marine and reptile environments. The Fluval U4 is a compact and versatile internal filter for aquariums up to 240 l. This internal filter offers a lot of very helpful features, like the flip top, the separately removable filter media inserts or the easy cleaning system. Offering outstanding 3-stage filtration, increased water movement and vital aeration, Fluval U-Series internal filters are the perfect solution where external filtration is not possible. Now with new and improved design features. The Fluval U4 internal aquarium filter is very comfortable in handling. The outflow can be regulated and it can be mounted vertically or horizontally in the aquarium. Thanks to the flexibility in the positioning of the filter, it can be used as a primary filter in smaller aquariums or as a supplementary filter for larger aquariums. Their unique ability to be placed at the bottom of your aquarium makes it ideal for low water levels.The Adjustable 3-Way Flow Control feature (U2, U3 and U4 models) lets you position the water flow output to meet your specific needs.

Fluval U series filters provide the option of setting the flow output in 3 different positions, a key benchmark in underwater filtration. Stage 1 consists of a Foam pad which is designed remove large particles from the water all part of the mechanical filtration. These foam pads should be replaced every 6 months. For shallow tanks, lay it vertically to create a decorative waterfall feature. The long and slim structure of this water filter allows it to be placed horizontally. Using a three-level system with three varied types of filtration pads, this aquarium water filter ensures improved water quality and a healthy environment for fish. From saltwater to freshwater, the Fluval water filter is suitable for all kinds of setups with or without reptiles and plants.

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The Fluval U1 Underwater Filter is ideal for use in fresh, marine or reptile environments. Use the U1 as a primary filter in smaller aquariums or as a supplementary filter for larger aquariums. It is also ideal for tanks with low water levels. The U1 includes an adjustable flow control and comes complete with 1 foam pad. The filter provides the option of setting the flow output in 3 different positions, a key benchmark in underwater filtration. The adjustable 3-way flow control feature lets you position the water flow output to meet your specific needs. The Top Output setting provides maximum circulation and oxygenation, the Integrated Spray Bar setting provides a gentle, even flow for planted aquariums, and the Bottom Output setting is for deepwater agitation.

The more things change, the more they stay the same. Except in the case of the Fluval U range of internal filters. They’ve changed, and they’ve gotten a bit better, says Nathan Hill. Fluval's new Fluval U4 filter. Large pallet items like aquariums are deemed delivered successfully with no damage once the the driver has left the property. If a report of damage is submitted after the driver has left we may be unable to assist with replacements. We recommend refusing a damaged delivery, this is the fastest resolution. Fluval U Series Underwater Filters provide complete and efficient 3-stage filtration, including BIOMAx biological filtering (U2, U3 and U4 models), to create superior aquarium water quality. Fluval U Underwater Filter provides complete and efficient 3-stage filtrationto create superior aquarium water quality. All models come with a Bio-Foam filter pad to remove large particles. The larger 2 sizes also include a Poly-Carb pad to assist with removal of fine particles, chemicals and odours. They also have the addition of Biomax filter nodes to assist with biological filtration.The U series internal filter range are an efficient reliable filter designed as the primary filter for smaller aquariums or a supplementary for larger aquariums. The Fluval U4 can be situated either vertically or horizontally which means this is perfect for both deep and shallow water aquariums such as turtle tanks.