Also available

• Nexx Crystal size 4 (2Pk)

  £11.99

  API Crystal cleans and clears aquarium water, leaving you with crystal clear water. It is suitable for freshwater, saltwater and reef aquariums.

  API Crystal is scientifically proven to remove organic aquarium pollutants, inncluding colours, odours, heavy metals and toxic gases which cloud water and degrade water quality.

  The Api Rena Nexx Crystal Size 4 has a pre-dosed cartridge for mechanical and chemical filtration. It offers optimum microfiltration with activated carbon and superior resins.

  The research-grade resin-carbon blend removes compounds that carbon alone cannot remove.

  Rena Crystal Cartridges also absorbs unwanted odours and colours. There is a large range of Rena Spares and Rena Parts and these Crystal Cartridges should last for several weeks

• Nexx Crystal Size 4 (4Pk)

  £19.96
• Nexx Aqua Detox

  £11.99

  The API Aqua-Detox removes toxic ammonia, nitrite and nitrate from your fish tank.

  The API Aqua-Detox should be used when starting a new aquarium or whenever ammonia or nitrite is detected. It should also be used whenever nitrate measures above 20 ppm (mg/l).

  It allows rapid aquarium start-up and offers optimum microfiltration with superior resins and zeolite.

  The Aqua-Detox  uses multi-stage filtration to remove small and large aquarium pollutants. 4 sized micro-filtration pad for micro-filtration, filled with superior resins for chemical filtration. 100% of water passes through the cartridge for best efficacy. No by-pass. Easy to change, no mess.

  Nexx replacement Aqua Detox cartidge for the Nexx Filter and Nexx Filter Extension. Includes two size 4 cartidges.

  In new aquariums replace weekly for one month. In established aquariums replace every two months or when undesirable levels are detected.

• Nexx Prevent Algae

  £11.99

  API Prevent Algae controls silicate and eliminates cloudy water caused by  phosphates.

  API Prevent Algaeis scientifically proven to remove phosphate and silicate, common  nutrients found in fresh and saltwater aquariums.

  It reduces maintenance. Promotes the growth of reef-building corals and prevents calcium precipitation caused by excess phosphate. Safe for all fish, invertebrates and planted aquariums.

  Prevent Algae offers multi-stage filtration to remove small and large aquarium pollutants. 4 sized micro filtration pad cartidge for mechanical filtration, filled with superior resins for chemical filtration. 100% of water passes through the cartridge for best eficacy. No by-pass. Easy to change - no mess.

  Rena Nexx replacement Prevent Alage cartridge for the Nexx filter and Nexx filter extension.

  Size 4 two cartridges included

• Nexx Foams

  £11.99

  Nexx filter foam is a two pack of filter foam designed for use with the API filter.

  It is specially shaped and provides a coarse layer of filtration media

  The nexx foam can be used in the top section of the filter to catch additional debris from your aquarium