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      Red Sea Bio Filters Merlin Plus
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      Description: A biological filter is the single most important type of filter used in the aquarium.

      As fish digest their food, ammonia is produced as a waste product. If no measures are taken the toxic ammonia will rapidly increase to lethal levels in the limited water volume of the aquarium. Bacteria of the genus Nitrosomonas and Nitrobacter oxidize ammonia through nitrite to nitrate, (which is non toxic to fish). This oxidation is known as the nitrification process.

      To be effective in an aquarium the nitrifying bacteria have to be present in sufficient numbers to be able to convert the fishes` waste products completely to nitrate. The application of bacteria in water treatment is called biological filtration (bio-filtration) and over the years various methods of bio-filtration have been developed for use with marine and freshwater aquaria and ponds.

      The efficiency of a biological filter depends on a number of parameters:

      · A large enough surface area of a suitable media for the bacteria to form a living layer also known as a bio-film.

      · Constant access to the ammonia, nitrite and oxygen (the "food" source of the bacteria).

      · A stable pH and temperature.

      · Protection from toxic substances such as contained in fish medications.

      Based on the inherent advantages of the Fluidized bed over alternative methods, Red Sea has conducted significant research into developing the MERLIN fluidized bio-filter.

      Fluidized bed filters in general and the MERLIN in particular, have the following natural advantages over a static filter bed (Trickle Filter/ Undergravel Filter):

      · A very large surface area per unit volume, which is a significant factor that limits the potential capacity of a particular filter system.

      · Optimum availability of oxygen, ammonia and nitrite, since every bacteria covered particle is in constant motion and completely surrounded by water.

      · Thin bio-film, due to the continuous brushing of the fluidized media. Thin bio-films are more effective, since the exchange of minerals and dissolved gases between the bacteria and their environment is faster.

      · The continuous motion does not allow the buildup of detritus, clogging, channeling effect or formation of anaerobic areas within the filter.

      · The constant motion facilitates the transportation of the bacteria colony throughout the filter media.

      · The absence of detritus minimizes the loss of bacteria if water flow is interrupted: i.e. filter can be switched off and moved without damage.

      Merlin Plus Up to 250gal/1000ltr Biological & Chemical HangOn/Stand Alnoe Chemical Cartridge Inc.

      Same great biological benefits of the Merlin, “plus” the added convenience of chemical filtration modules.

      The Merlin Plus 60 will chemically filter a 240-liter aquarium for one month.

      The Merlin Plus 120 will chemically filter a 480-litre aquarium for one month. Both filters are still rated for up to a 1000-liter aquarium for biological filtration capacity.

      The PowerChem cartridges are easily removed are available separately with three different media options. Both the Merlin Plus 60 & 120 units are supplied with carbon media modules for superior water clarity and gas absorption.

      Combines the fluidized bio-media with chemical filtration modules. Each PowerChem Carbon cartridge, (supplied with the unit is suitable for a 60 gallon (240 liter) aquarium for 1 month.

      The following additional PowerChem cartridges are also available for the Merlin Plus units:

      · PowerChem Carb – Carbon for improved water clarity and gas absorption.

      · PowerChem Zeolite – For toxic ammonia removal in freshwater.

      · PowerChem Phos – For instant removal of phosphates in freshwater or saltwater aquariums

      Thousands of hours of our research into reef, marine fish, tropical and goldfish aquariums have shown that a fluidized bed is the most efficient and effective form of biological filtration. Experiments demonstrated that the Merlin, while significantly smaller than other bio-filters, can support bio-loads far in excess of other limiting factors such as behavioral patterns of the fish, and responds faster to an increase in bio-loads than other types of filters.
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      Hermit Crab
      Posts: 182
      Registered: May 2004
      Location: Troutdale, Oregon

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