Aqua Medic Ocean Runner 3500 Manuel d'utilisation - Page 10

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

leaking. The internal recirculation 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 4 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 tank

If connected to a new aquarium, the bacteria don´t have to be fed in the first 4 weeks,

as the nitrte forming bacteria Nitrosomonas and Nitrobacter need this time to

develope and to oxidise ammonia to nitrate.

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

be controled with a redox probe ( see options) In a normal loaded tank, one

tablet/day is suffucient. It is also possible to feed several ( up to 5) tablets at a time.

In this case the filter does not need to be fed for some 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.

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 suply

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, 1.5 - 2 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.

Maintenance.

1. Control of the flow rate

The flow rate through the filter has to be checked regually. The optimum is between

2 - 4 l/h.

2. Recirculation pump. The recirculation pump has to be controlled regually for

clogging. The pump housing has to be opened and the magnet with the needle wheel

are removed. Both is cleaned under fresh water and mounted again.

3.Cleaning If the bacterial biomass has increased after some years, the Bactoballs

can be removed, cleaned with aquarium water and filled in again.

4. Renewal of Deniballs. The Deniballs have to be refilled/replaced once per year.