sera guide - My pond

7 pH value The pH value provides information whether the water is acidic or alkaline. The scale ranges from 0 – 14, the ideal value in ponds is 7.0 – 7.5. This parameter is subject to strong variations caused by plant activity or rain. Values between 6.8 and 8.2 may thus be consid- ered alright. In the following, you will find a short over- view about the parameters which are im- portant in a pond, what they mean and how they can be corrected: A tip: Water parameters in ponds strongly depend on the time of day, the weather and many more parameters. They should there- fore always be checked at the same time of day. Water hardness The water hardness is mainly described by total hardness and carbonate hardness. The total hardness (GH) is defined as the amount of dissolved calci- um and magnesium in the water. These two minerals are indispensable for healthy growth of fish and plants. The carbonate hardness (KH) is one of the most important water parameters, and is of- ten described together with the pH value as it is able to stabilize it. This means it buffers variations, and the pH value does not get in- to regions which are toxic to fish unnoticed- ly. The KH should always be above 5°dH. We recommend sera pond bio balance for increasing both total hardness and carbon- ate hardness, and thus for stabilizing the pH value. sera pond bio balance should also be dosed after strong rainfalls or a water change. 7 4 5 6 7 8 9 10 acidic water alkaline water more acids more bases acidic neutral alkaline Acidic or alkaline – the pH value

sera guide - My pond

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