Aqua Medic Nitratereductor NR 5000 Manuel d'utilisation - Page 6

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Inflow. The inflow into the reductor, can be realised as a bypass from the main circulation

pump with the included T-pieces. The flow rate is adjusted with the valve and the drop

counter.

6. Starting

Before starting, the Nitratereductor is filled with aquarium water and controlled for leaking

and the right position of the sealing. Take care for exact positioning of the O-ring. The

circulation pump can be switched on.

Connection to an existing aquarium

If a Nitratereductor is connected to an existing aquarium with a rather high nitrate level, the

inflow of aquarium water should not immediately be started. The bacterial growth is enhanced

by the addition of 10 tablets of Denimar. If, after 8 - 14 days, the nitrite has dissapeared

from the reductor - a residual concentration of nitrate is harmless - the water flow can be

switched on.

Connection to a new aquarium

If connected to a new aquarium, the bacteria do not have to be fed within the first 4 weeks, as

the nitrate forming bacteria Nitrosomonas and Nitrobacter need this time to develope and to

oxidise the whole amount of ammonia and nitrite into nitrate.

Feeding

The feeding has to be adjusted according to the nitrate loading of the aquarium. It can be

controlled with a redox probe (see options). In a normal loaded tank, one tablet per day is

sufficient. It is possible to feed several tablets (up to 15 pcs.) at a time.. The filter needs then

no feeding for several days.

After some time, a slimy bacterial biomass is formed in the Nitratereductor. This a normal

process. A high bacteria population ensures a high removal rate of nitrate.

7. Feeding with Deniballs

Deniballs are made of a biodegradable plastic material. This plastic

material is also produced biologically - the raw material is produced by bacteria. This new

plastic material is completely biodegradable. It can be used by denitrifying bacteria in the

Nitratereductor to remove nitrate. The Deniballs supply the surface area and the food for the

bacteria at the same time. This means, that a Nitratereductor filled with Deniballs has not to

be fed for a longer period - up to one year. The quantity of Deniballs which are necessary for

a Nitratereductor depends on the loading of the tank. For a normal loading, 5 l are enough.

The rest of the filter is filled with the standard Bactoballs. The Deniballs need - especially

in a seawater tank - a longer period to reach their full capacity.

8. Maintenance

1. Control of the flow rate. The flow rate through the filter has to be checked regularly. The

optimum is at app 10 l/hr. This has to be readjusted from time to time.

2. Recirculation pump. The recirculation pump has to be controlled regularly on clogging.

The

pump housing has to be opened and the magnet with the needle wheel removed. Both is