Numerous invertebrates have a skeleton or case of calcium carbonate. Hard- or soft corals existing symbiotically those can not include these elements over the feed must withdraw she from the ambient water.

Growth and good health of such kinds depends significantly on the high lime content of the water. Only finding of the last years (its result of the C1501 is) allow a growth of reef forming corals at all with great success. The Aquazoo Düsseldorf/Germany could with a construction alike device (volume nonetheless 20 l) in its, 20.000 l of panorama tanks the growth of all kinds of acroporas by 100% increase, in the case of Xenia still far over it, at the remaining soft corals and hard corals on average by 50%.

Too the anthozoes having zooxanthells increased by far better. Invertebrates with lime depositing zooxanthells call tracing with a high calcium value alone are low at, too bicarbonate must be contained at sufficient crowd. The calcium content of the fish-tank water can indeed be raised by the method of adding lime with calcium hydroxide (calcium hydroxide), in this case, bicarbonate is however formed depending on from the carbon dioxide content only little!

If more hard corals are in the tank it can supplied to the ecological system with the calcium reactor C1501 both in elegant way at sufficient quantity.

The water capacity supported by the turbine to the greatest extent pours (99%) "short-circuited" via an intern circuit (throughput 80 g/h), through what the average hold up time of the water is increased in the reactor by a multiple, very decisive what for the function the C1501 is. In order to increase this further a relatively high internal pressure is. Would be one the frequent flow rate of the water on only once recalculate (system without circuit switching known therefore), would must the C1501 a reactor tube length filled have with substrate of more than 60 m!

Only a small water capacity is guided exact into the tank from this circuit back (approx. 0,25 g/h). The C02 is mingled optimally on account of the construction of the turbine (C02 supply over admission) so that the innu-merable C02 bubbles can distribute themselves over the big surface of the fine-grained reactor substrate in the reactor bed. Carbonic acid content optimal in compatibility of internal pressure, long hold up time, high pour-ing rate, (pH under 7) and vaporization as well as substrate solve the reactor water the desired substances optimal.

Saturated by the frequent guiding of the reactor water over the substrate with carbonic acid is the reactor water as extremely calciumbicarbonatecontaining that already a small coming replacement crowd is sufficient (doeseable by means of cock) for the hardening of the fish-tank water. In this way, the entry of surplus carbonic acid is reduced to a completely problem-free minimum unlike single flow cameras into the fish-tank. Circuit switching caused on the other hand a maximum use the train led carbon dioxide. By the optimal buffering of the marine-tank water during effort the C1501 (pH-variation are reduced to a minimum) spare itself the effort more expensively electronic pH-control element.

Growth supporting carbonate hardening in the tank of 12° degrees (optimal growth value) can be achieved without problems with the KORALLIN C1501 since the outlet waters normally carbonate hardening more than 30 KH-degrees show. Higher values are indeed also slightly possible, however, then bring no improvement more. Since the capacity of a calcium reactor depends on kind of the employed substrate at considerable measure, filling in its composition the C1501 is result of long series of measurements. In the case of unsuitable filling sinks effectiveness around up to 70%.

During the decomposition of the C1501 substrate, the elements reach the fish-tank precisely which the corals had withdrawn from the water during lime formation. One more biological therefore, supply of the lime building up supplements is hardly possible and cause for the great success of this system.

Another positive side effect results from the consumption of calcium carbonate which increases during increase of the calcium bicarbonate part. During illuviation of calcium carbonate, phosphates solved also always are carried away and as hard soluble bound calcium hydrogen phosphate to celebration substances. For a coral care, a minimum phosphate value is from great importance since phosphate disturbs the lime formation process considerably and favors a bore algae growth.

The maintenance of C 1501 is conceivably simple. The substrate is replaced merely all 3-4 months with new. The further maintenance limits to an occasional adjust the CO2 and the return water capacity. For simple ventilation, C 1501 has a separate ventilation possibility. The energy consumption of the employed Eheim pump is minimal.

The "02" types are in USA specification.
 

C 1501: height: approx. 400 mm; diameter reactor tube: 110 mm; bottom-plate 160 mm; Filling up to 3 kg; Eheim pump power: 600 l/h; for tanks up to 1.500 l
C 3001: height: approx. 710 mm; diameter reactor tube: 110 mm; bottom plate 160 mm; Filling up to 6 kg; Eheim pump power: 600 l/h; for tanks up to 3.000 l
C 4001: height: approx. 600 mm; diameter reactor tube: 160 mm; bottom plate 190 mm; Filling up to 10 kg; Eheim pump power 1200 l/h; for tanks up to 4.000 l
C 10001: height: approx. 1100 mm; diameter reactor tube: 160 mm; bottom plate 190 mm; Filling up to 20 kg; Eheim pump power 2400 l/h; for tanks up to 10.000 l