The pH value is a major factor in plant growth and health and equally important to fish condition and colouration. There is a marked visual difference in the behaviour and colour of most fish when they are kept within suggested pH ranges.
This is another critical test that can help prevent immediate loss of fish. The pH level dictates the percentage of two forms of ammonia that can be present at the same time within an aquarium. The gaseous form of ammonia is the toxic form, NH3, the higher the pH value above neutral (7) the greater the toxic component.
