Pool & Spa Scene: NATURAL POOLS
[ Natural pools must have a thriving pond
ecosystem. The plants and the gravel they are grown in act as biological filters. ]
>
as growth. Although natural ponds are rarely heated, careful monitoring throughout the seasonal fluctuations is strongly recommended. Higher temperatures will also have an effect on the Ammonia levels. The temperature should be kept at up to 25°C under normal conditions with a maximum of 28°C for a total of 5 days.
Ammonia is produced from the decomposition of organic wastes resulting in the breakdown of decaying organic matter such as algae and plants. Ammonia levels depend on the temperature of the water and its pH. For example, at a higher temperature and pH, a greater number of ammonium ions are converted into ammonia gas thus causing an increase in toxic ammonia levels within the fresh water.
Nutrient levels refer to the amount of phosphorus and nitrogen that are present in the water. Increased levels of nutrients may be harmful. It can cause excessive plankton growth, potential blue-green algae and oxygen depletion. For more information on effective natural swimming ponds then contact the Lovibond Tintometer team. Lovibond Tintometer Tel. +44 (0)1980 664800
www.lovibondwater.com
ABOVE: The pH level may rise during the day as phytoplankton and other aquatic plants remove CO2 from the water during photosynthesis. Photo: swimming-
teich.com.
LEFT: Specially designed ponds first appeared in Germany and Austria during the 1980s but they gaining popularity throughout Europe. Photo: Schwimmbad & Sauna / Grafinger.
66 Pool & Spa Scene: NATURAL POOLS
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