What is pH?
pH is the
measure of the acidity or alkalinity of the water in your pond. The
pH scale runs from 1 to 14. Very acid water is pH 1 and very
alkaline water is pH 14. Neutral water that is neither acid nor
alkaline is pH 7.
Why Test for
prefer the pH or the water to be between 7 and 8. Fluctuations
outside these parameters can cause stress to the fish. If the water
becomes too acid or alkaline the fish soon die. It is important to
regularly test the pH, as new ponds can occasionally rise in pH, and
older ponds tend to acidify over time. Also check the pH in the
morning and evening as daily fluctuations are common, especially in
heavily planted or algae infested ponds.
What is the
correct level of pH for my pond?
There is no
definitive correct pH level for pond fish although ideal values lay
between 7 and 8. In a healthy pond the water pH will be the same as
that of the tap water (or spring water etc) that fills the pond. It
is important to ensure the pH is a constant value. Fish in water
with an unstable pH rapidly become very ill.
What do I do
if the level is wrong?
pH adjusters will raise or lower the pH respectively. If you do need
to adjust the pH of your pond it is vital to do this slowly so as
not to shock the pond inhabitants. Change no more than 0.5 pH units
per 2 days. Providing your tap water is of suitable pH, substantial
water changes can correct a dangerous pH level. It is also important
to check the KH of your pond water.