Stage 3 consist of the bio max ceramic media designed for colonising filter bacteria all part of the biological filtration. These should be change in rotation to the foam media every 6 months. All parcels require a signature upon delivery, meaning that our courier is unable to leave an item without a signature.

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. 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. 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.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. position horizontally for shallow tanks, larger tanks with low water levels, or to create a decorative waterfall feature

The complete line, consisting of Fluval U1, U2, U3 and U4 Underwater Filters, includes many practical and versatile features that make them ideal for application in fresh, marine and reptile environments.

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.

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. Internal Filters are an excellent option for small to medium sized aquaria. They are simple and easy to set up, they sit just inside the aquarium itself meaning they can be easily installed into any fish tank, with no troublesome pipes and hoses. They will also work well as a powerhead for water circulation, with the added bonus of the extra filtration. It is worth noting that you should clean your filters impellor every couple of weeks to ensure it is functioning normally and keeping the water moving around the tank. U series underwater filters offer superior water purification, movement and aeration capabilities and have been designed for use in both fresh and saltwater applications. 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 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. 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.