Different seasons require different care. This is the case in Central Europe at least. But even in countries where there are no cold winters with minus temperatures, factors like rainy seasons, dry seasons or perhaps a summer with particularly high temperatures all play a decisive role for the garden pond.
In spring two processes happen at once: On the one hand the water temperatures rise and the fish start to become active after the winter. Then it is essential to choose the right food for low temperatures ( JBL PondEnergil ) and a vitaminization of the food ( JBL Atvitol ), to strengthen the resistance of the animals, which is the only measure to effectively prevent disease problems, such as spring viraemia.
On the other hand the many nutrients dissolved in the water (nitrates, but even more phosphates) result in burgeoning algae growth as soon as the solar radiation increases. The shade provided by the water plants and other vegetation around the pond is still missing. This means that spring is almost the last chance all year to bind the nutrients and thus deprive the food source of the emerging algae (eg. JBL PhosEX Pond Direct ).
At the same time the monitoring of the water quality (carbonate hardness) is strongly advised because rain falls strongly dilute the mineral content and this leads to very soft water. Check the carbonate hardness either with the JBL KH Test JBL KH Test or with the JBL PondCheck , in order to find out how stable your water is after the wintertime.
In summer three situations arise at the same time:
Strong thunderstorms in summer with heavy rainfalls decrease the water hardness drastically and your pond water is not stable anymore. With JBL StabiloPond KH you can re-stabilize your water and prevent high fluctuations of the pH level.
In autumn several factors have to be considered:
To prevent losses, the fish have to be prepared for the wintertime.
Due to the leaf fall the water pollution with organic substances increases.
Lentamente muoiono le piante acquatiche e le alghe. Passando nella loro fase invernale liberano i nutrienti conservati nei loro tessuti e li ridanno all’acqua. Questo crea la premessa per la crescita delle alghe nell’anno seguente. (Link: Il problema delle alghe oggi ha la sua causa …)
Autumn and early winter (before the start of the frost period) are the ideal times to remove nutrients from the pond water (to really get them out of the water system). These are the only times when the algae promoting nutrients are really free inside the water and not bound to the algae. The absorption of nutrients in autumn is vital for the coming year and should happen over JBL PhosEX Pond Filter (nutrient export), alternatively through JBL PhosEX Pond Direct .
The fish need to eat hearty and varied food in this phase to increase their resistance and to create reserves of strength. Sickness in fish in springtime is very often caused by insufficient strengthening for the winter. A vitamin supplement every 2 day to the food ( JBL Atvitol ) significantly increases the resistance of the fish.
Leaf fall into the pond can be significantly reduced by using netting or can be counteracted by mechanically taking out of leaves. If lots of leaves have accumulated, helps JBL SediEx Pond (bacteria & oxygen).
Although the pond is dormant in the cold season you nevertheless should pay attention to a few basic things:
Not every winter is extremely cold and “warm” periods can occur where fish become active and want food. In these phases it is important and recommended to feed the fish, but only with a specific and an easy digestible food which also doesn’t stay long in the digestive tract of the fish during the low temperatures (e.g. JBL PondEnergil ) or JBL Koi Energil midi .
If ponds are less than 150 cm in depth they may completely freeze. With an ice-free device and a specific aeration under the device ( JBL PondOxi-Set ) you can usually prevent the pond from freezing all the way to the bottom.
If a pump is in operation it should NOT be placed at the deepest point because it would mix all the water layers. But a water temperature of 4 °C needs to be kept in the deeper regions where the fish can then survive the winter.
The water supply into the deep zone of the pond is essential. Because of the stratification of the water the use of an aeration system is not suitable, the application of JBL OxyPond is a measure for the oxygen enrichment in the deep zone.
Generally the seasons in Mediterranean regions don’t differ significantly to those in the temperate climate zones, with the exception that the summers are much warmer and drier (winter rainfall areas) and in winter periods of heavy frosts are quite rare. The most important differences refer to the summer and winter months.
In summer two situations arise at the same time:
Rainfall is common in winter. Periods of frost are possible but are rarer, don’t last as long, and are more moderate compared to those in temperate areas.
Winter rainfall drastically decreases the water hardness and your pond water is no longer stable. With JBL StabiloPond KH you can re-stabilize your water and prevent high fluctuations of the pH level.
In the dry season/summer three situations arise at the same time:
After intense water evaporation, mineral containing tap water is usually used as a top-up. Because only pure water (H2O) evaporates during the evaporation, leaving the minerals behind in the residual water, it’s better to check that the mineral content hasn’t increased too much ( JBL GH Test ).
In the rainy season the situation reverses:
A lot of demineralised rainwater is supplied to the pond during strong rainfall. In fact this occurs in such quantities that it results in a complete water change within a very short time and the mineral content falls to a dangerously low level. The monitoring of the general hardness and carbonate hardness ( JBL GH Test and JBL KH Test ) will then decide, and appropriate re-dosings of JBL StabiloPond Basis need to be carried out.