Recommended for aquariums up to 1,100 litres (290 USgal.) of salt water. Dimensions: L125 x W113 x H418 mm (L4.9 x W4.4 x H16.8 in.) 230 V / 50 Hz (115 V / 60 Hz) 23 W, Water throughput: 1,300 l/h (343 USgal./h) Air capacity: 650 l/h (171 USgal./h) Skimmer cup volume: .7 l (.18 USgal.). Equipped with the accessories for internal and aquarium cabinet operation.
At an immersion depth of 240 to 290 mm (9.4 to 11.4 in.), the Comline DOC skimmer models can be placed easily and discreetly in the aquarium directly. The inlet of fresh water can be set at between 5 per cent and 70 per cent. They can also be used in aquarium cabinets with variable levels from 100 to 280 mm (3.9 to 11 in.). The accessories supplied have to be used to ensure the generation of a constant internal water level. The water circuit is totally open and operates at a fresh-water inlet of 100 per cent; depending on model, a water throughput of 1,200 l/h or 2,400 l/h (317 US gal./h or 634 US gal./h) is achieved, distinctly improving the gas exchange in the aquarium. In case of operation in aquarium cabinets, the cartridge core on the outlet pipe ensures bubble-free outgoing water. Skimmer cup and foam reactor are one unit in all TUNZE® DOC skimmers. Every cleaning of the skimmer cup leads to the reactor being cleaned at the same time, and thus a very constant and efficient foam production is ensured. During the cleaning process, the Hydrofoamer remains operational and automatically flushes the jet and the air passage. Delivery condition: Completely ready for mounting with numerous holding devices like in Comline Filter or Reefpack 500.
Marine aquarium inhabitants produce waste substances, the quantity depends on the livestock and the feeding. By means of an effective skimming system, organic waste matter, the so-called DOCs (Dissolved Organic Carbons), can be removed. To mention but a few, these are substances such as proteins, cellulose, dead cell substances from bacterial and algae. In high concentration they are harmful for any aquarium biotope. The DOC skimmer removes these compounds effectively from the water circuit, better than a bio-mechanical filter, which means that by removing proteins “before” bacterial decomposition, crystal-clear water is retained and a rise in nitrate and phosphate is reduced. It can be observed that when air bubbles are produced proteins are absorbed immediately. In practice it can be observed that the absorbed matter is torn off the air bubbles again by skimmers with a tall reaction chamber. For this reason, all TUNZE® DOC skimmers have very short reactors with a high air throughput .
In the skimmer, the TUNZE® Hydrofoamer produces a large quantity of a mixture of 50 per cent of water and 50 per cent of fine air bubbles. Each air bubble has an active surface which binds the electrically charged DOCs (Dissolved Organic Carbons). The air water mixture is immediately transported into the middle reactor area, producing a dense foamy mass. The upper zone of the reactor is used to settle this foamy mass laden with protein, which is then removed into a special foam cup or into the foam extraction pipe. The purified water returns into the aquarium without bubbles or into the filter. By means of a special nipple, ozone can be introduced into the system, thus improving the skimming process and at the same time removing any yellowing matter in the aquarium water.
The Comline / Master DOC skimmer with hydrofoamer has an open water circuit which can be controlled. Apart from the air output, the flow rate of the skimmer determines the output of the DOC skimmer. In addition, due its biotope composition, every marine aquarium has a different sensitivity with respect to the organic load. Based on a standard marine aquarium with soft corals, the data on the suitable skimmer size may differ in other biotopes. For this reason, the aquarium volumes recommended for the skimmer should be reduced in case of sensitive biotopes: Low sensitivity In soft coral aquariums with long-polyp corals and anemones, for example, the share in dissolved organic matter may be higher, sometimes it may even be vital. In this type of aquarium, the recommended aquarium volume can be used without deduction. Medium sensitivity A medium organic stability is usually found in mixed aquariums inhabited with soft and stone corals (LPS). Filter-feeding animals, sponges, et cetera, are found there frequently as well. For these aquariums, a reduction of about 40 per cent of the skimming capacity is calculated. A skimmer for 1,000 litres (264 USgal.) should thus be used for an aquarium of about 600 litres (159 USgal.) which has this kind of reef design. High sensitivity Aquariums with primarily small-polyp stony corals (SPS) require an especially high degree of purity. They should have no load of phosphates or nitrates worth mentioning. Good oxygen saturation and very clear water are the pre-requisites. Comline DOC skimmer is also often used as a “stand-alone” solution in these aquariums. This type of aquarium should be reduced by about 60 per cent in volume for the skimmer volume mentioned. High sensitivity and high load Hard coral aquariums with a high population of fish require an extremely high skimming capacity. The skimmer has to ensure the degree of purity for the hard corals at an above-average high fish load. If the Comline DOC skimmer has to operate as a “stand-alone” solution here, a high performance is required. This type of aquarium should be reduced by up to 70 per cent in volume for the skimmer volume mentioned.
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