Nitrate – What is Nitrate?
Nitrate is produced by the beneficial bacteria in the pond filters
as they break down the fish’s toxic waste products(ammonia and
nitrite). Nitrate is not toxic to pond fish, but excessively high
levels can affect their reproduction.
test for Nitrate?
Nitrate is a plant nutrient. The more nitrate is present the greater
the potential for plant growth. If insufficient plants are present
then algae will begin to dominate in the pond. Ponds with high
levels of nitrate frequently have problems with algae and blanket
What is the correct Nitrate level in my pond?
The level of nitrate in your pond depends on the nitrate level of
the tap water (or spring water etc) feeding into the pond, the
number of fish and the amount of food fed. High nitrate levels will
lead to algal growth. A nitrate level of zero is ideal and implies a
ba1ance between waste produced by the fish and nutrients taken up by
the plant life. Remember that this plant life does include algae.
What do I do id the Nitrate level is wrong?
Maintenance of a zero level of nitrate in a pond is extremely
difficult. Most domestic water supplies have a low level of nitrate.
The key to maintenance of low nitrates is regular water changes to
dilute the build up of nitrate. Also, increasing the higher plant
life in the pond to use up the nitrate. This will lower the amount
of nitrate available to algae.