External filters are an excellent option for medium sized aquariums and upwards. Their large size and power means they are the most suitable option for larger aquariums, or those that are heavily stocked or house messy fish which produce a lot of waste. Excellent for aquariums housing large and/or big groups of cichlids, carnivorous fish species, oddballs, stingrays etc. They are also a great option for those who wish to invest a bit more in a filtration system in order to cut back on aquarium maintenance. A larger filter means larger surface area for beneficial bacteria which means more waste can be broken down. Being an external filter there is no large unit that sits inside the aquarium itself, just some intake and outlet pipes, this makes it easier to create a more natural aquascape and also gives your fish more room to swim! It is worth remembering the clean out your filter impellor regularly in order to keep your filter working to its full potential. The All-New 07 series marks the 7th incarnation in nearly 4 decades of Fluval's top-selling canister filter family worldwide. Not only does the latest generation incorporate the power and reliability you've come to expect from the leader in aquatic filtration, but it also features several new performance upgrades that make it up to 25% quieter and more robust, energy-efficient, flexible and easier to use than ever before. Key Features Efficient Technology eTEC (Efficient Technology) is at the heart of the 07 series. It’s a synergistic process where forward-thinking design, cutting edge materials, and state-of-the-art manufacturing processes come together to deliver powerful pump performance, reduced energy consumption and ultra-quiet operation. The new design of pump and rubber feet stabilisers result in up to 25% quieter operation. 07 filters are big on power, yet small on energy consumption. The 107 and 207 models, for example, draw as little as 10 watts of electrical energy, which is equivalent to a single household LED lightbulb.  Fast Action Maintenance The new ergonomic design of the Aquastop Valve allows for smooth operation, the extensive plastic ribbing in the design makes it over twice as strong as the previous generation. The lift lock motorhead clamps made from a new fibre-reinforced material have a single action dual locking mechanism for quick release and attachment.  Quick Easy Primer The new redesigned primer requires fewer pumps to engage than others on the market. The new fibre-reinforced priming handle is 7x stronger to prevent breakages. The larger easy-grip handle provides fast, effortless start-ups. Overall this gives better performance with less fuss (can be operated with 2