The pond water quality of your garden pond will have an outcome on the health of both the fish and plants in your pond. Fish typically get sickly whenever the water quality is not correct. Any long term higher than normal exposure to ammonia, PH or nitrates levels will make your fish much more likely to succumb to an illness. A pond keeper should attempt to practice prevention instead of cure. It is not an unmanageable task to maintain quality pond water. Fish diseases can spread very quickly. An everyday misunderstanding is to consider that clear water is healthy water and to try purely to attain this goal.
In chemistry, pH is a measure of the acidity or basicity (alkali) of a solution. It is measured in a scale known as the pH Scale. A pH below 7 shows acidity, above 7 is alkalinity and exactly 7 is neutral. Its quite normal for pH levels in a healthy pond to fluctuate slightly. Fish respiration, filter operation and water contamination all have an result on the carbon dioxide levels in the pond water. As normal tap water contains a number of impurities it should, where possible, be avoided when topping up water levels, although in the real world it commonly cannot be avoided. You can buy water additives that will make tap water more suited for garden pond fish. Common types of garden pond fish will thrive in water with a pH level of between 6.8 and 9
As ammonia comes from fish food. This is just a problem in garden ponds as the environment is not natural. Ammonia is very toxic to fish and causes respiration difficulties. Ammonia levels are controlled by water changes and correct filtration. Never be tempted to over feed your fish since this will sooner or later raise the ammonia levels. Only feed adequate food that is eaten within a couple of minutes. In nature, the levels of fish are determined by quantity of food and consequently no ammonia issue, however in an contrived garden pond the quantity of fish is set by the pond keeper. So limit the measure of food and stocking levels.
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