General information

The model series of the Comline DOC skimmers has been developed for an effective and modern protein skimming process in marine biotopes from 200 to 2,000 litres (52 to 528 US gal.). They stand out for their compact dimensions at the same time ensuring a high foam cup capacity, and producing a very high throughput on account of their air capacity of 650 or 1,300 l/h (171 or 343 US gal./h), for example, depending on the model. They can be placed directly in the aquarium or in cabinet systems with a variable water level.

The “Nano” model series has been designed for the use in reef biotopes up to 200 litres (52 US gal.), and is gentle to the plankton in operation. The DOC Skimmer 9002 removes up to 80 per cent of organic waste matter, such as protein and cellulose, from the aquarium water. Very little space is required in the aquarium, and its handling is very easy. On account of their construction, these models are particularly quiet during operation. On account of the high demands in stone coral aquariums, this skimmer should be used only in aquariums with about 100 litres (26 US gal.) of water. Mixed aquariums or soft coral aquariums up to 200 litres (52 US gal.) can be set up without any problems.
Delivery condition: Completely ready for mounting with holding device for vertical panes and horizontal glass tops up to 19 mm (.74 in).

Principle

By means of the water jet of the Nano pump and a high-performance jet, a fine pearly air mixture is produced which is released into an easy-to-clean skimmer cup through a newly developed reflection system. The protein-containing aquarium water diffuses into the skimmer through the opening in the bottom and on the rear, which is gentle to the plankton, thus suitable in particular for breeding tanks with living plankton.

How do you select the right DOC skimmer for a marine aquarium ?

The Comline 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 20 per cent of the skimming capacity is calculated. A skimmer for 1,000 litres (264 US gal.) should thus be used for an aquarium of about 800 litres (211 US gal.) 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 40 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 60 per cent in volume for the skimmer volume mentioned.

DOC Skimmer 9002 (9002.000)

Recommended for aquariums from 40 to 200 litres (10 to 52 US gal.) of salt water.
Dimensions: L125 x W55 x H338 mm (L4.9 x W2.1 x H13.3 in.)
Immersion depth: approx. 180 to 220 mm (7 to 8.6 in.),
230V/50Hz (115V/60Hz) 10 W
Skimmer cup volume: .3 l (.079 US gal.)
Air capacity: 150 l/h (39.6 US gal./h)