Water is a very remarkable substance.  The extraordinary properties of water have a direct existence of our fish.  A fishes body is composed of more or less than 80% water.  So it is easy to envisage fish as a volume of water separated from a volume of water (pond) by a thin membrane (the skin).  The most insignificant changes in the pond environment will therefore, have a direct and almost instantaneous influence on the life of our fish.

  Each and everyone of these influencing factors, let's call them - IFS - is dynamic.  This is very important to remember when dealing with pond situations.  Sometimes we create problems which are not really there.  During the course of a 24 hour day each IF has a natural dynamic change.  These dynamic variations can be recorded and a daily pulse can be observed.  As the seasons change so do some of the parameters - the most obvious is temperature.  A pond or water system has a natural bio-rhythm of life which fish have adapted to.  At any point of time, during the day or year, a measurement of one or the other IF will be different when compared to another measurement taken at a different time of the day or year. 

  These fluctuations or dynamics should never be viewed in isolation.  A single reading on a test kit will present a distorted view of what is really going on in your pond.  You may be panicking for nothing.