Nitrite…..What is Nitrite
produced by the beneficial bacterial in your pond filter as they
break down the harmful and toxic ammonia caused by fish waste,
overfeeding etc…although nitrite is not as toxic as ammonia it can
still be very damaging to the health of your fish, classed as the
‘silent killer’ when Nitrite is present the water can be ‘gin’ clear
giving the impression of superb water quality. After it is broken
down it turns into Nitrate which is virtually harmless to your pond
fish – this becomes the three stage Nitrogen Cycle……
present in the pond can damage the health of your fish. Toxic
nitrite can build up in ponds where there are insufficient filter
bacteria to deal with the total waste from the fish in your pond
situation can arise in new ponds, when new fish are added, when the
filter bacteria have been disrupted (e.g. during cleaning), or
during accidental miss-dosing of pond medications.
the correct Nitrite level in my pond….
There is no
occasion where any Nitrite is tolerable in a fish pond. A level of
zero mg/L (PPM) must be maintained at all times.
What do I
do if the Nitrite level is wrong……
If a level of
0.25 – 0.5mg/L (ppm) is recorded then add a good quality filter
booster. If a level above this is recorded then a substantial water
change is essential. Change 25% of the pond volume for 1mg/L (ppm)
nitrite and 50% for nitrite levels above this. Zeolite will remove
ammonia (and thus nitrite) from pond water and then can be
recharged. If you do record a nitrite level in your pond, then it is
important to check other vital water quality parameters, especially
Oxygen, pH and Ammonia.