8
Problems with the denitrification are mostly caused by wrong adjustion of the flow and the
feeding rate. They can only be determined by measurements of the nitrite and nitrate
concentrations in the filter or by measurements of the redox potential.
- The
pump produces noise.
If the pump housing contains air or gas, this causes a strons
noise. In this case, the pump is pumping little or no water, and its cooling is insufficient. The
pump may overheat and be destroyed. The plastic elbow at the pump outlet has a small hole,
where air and gas can escape. If this hole is blocked, it has to be cleaned with a needle.
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Nitrite in the outlet of the filter.
If the outlet of the filter contains high amounts of nitrite,
the feeding rate is too low. Increase the feeding or lower the flow rate. In most of those cases,
the redox potential is too high (above -50 mV).
-
Nitrate in the outlet of the filter.
High residual concentrations of nitrate often occur
together with high nitrite values.
Caution!
Most nitrate tests are disturbed by high nitrite
concentrations! In this case, the redox potential is also too high. Increase feeding rates,
decrease the flow rate.
-
Hydrogen sulphide in the outlet of the filter.
The filter smells like fouling eggs. In most
cases, the redoxpotential is too low. Reduce the feeding, check the flow rate and increase it if
necessary.
11. Warranty
GmbH guarantee 12 months from the date of purchase on production and
material defects. Further claims and claims resulting from improper use are excluded.
Warranty only by proof of purchase with the original invoice.
-
Technical changes reserved –
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GmbH. Bissendorf
