Fluval U2 Filter Media - Poly/Clearmax Cartridge, 2-pack.

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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. Bio-media does clog over time, and it is recommended to provide clean filter media for effective colonization by bacteria. This family of nitrifying bacteria will benefit from partial media changes every 3-6 months to ensure clean porous surfaces are available. Regular cleaning and replacement of mechanical media, such as foam, also promote better conditions for the growth and prosperity of these beneficial bacteria.Remember, your aquarium filter will best support your aquarium when it is properly maintained. As we have pointed out above, filter media defines the capability of your filter. Just like the tools in the hands of a skilled mechanic, your filter is one of the most important tools for ensuring you have a well-tuned and healthy aquarium. FLUVAL TV

A simple media upgrade is the polyester pad, though with some models it appears to be more about selling the pads as a disposable and hence replacable item more than it actually appears to benefit.

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Your filter should be used to its full potential by ensuring its output is aggressively moving the surface of the water since this is how you increase the dissolved oxygen content in water. 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 ability of some filters to take extra media is a feature that has definitely come to the fore in recent years. The more media the better, as it means more cleaning power and more waste reduction power. 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. If your filter fits into the rear corner you may not want a water flow that is only unidirectional. Having the option of being able to direct the flow left to right and/or up and down gives greater flexibilty and is a function easily achieved by the manufacturer at little cost.Internal filters are the most popular type of filter on the market, with the biggest choice of models and probably the most varied group of people using them — from beginners to nano owners to quarantiners to big cichlid and oddball keepers. Internal filters are readily available and have to cope with a huge range of situations. What I want from any internal is versatility and reliability, as they are often the only form of filtration used in the aquarium. 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. Different filter media exist for varied purposes. For example, for removing an odour or improving water clarity, carbon would be your typical choice. So, let’s consider the basic types of water filtration as well as the types of filter media best suited for the job. FILTRATION – 3 BASICS TYPES MECHANICAL For the health and survival of your fish you will want to ensure there is strong biological filtration present, and in this case you could use Fluval BioMax and/or Fluval Bio-Foam.