Oyster shells for pond - 20KG per bag

Oyster shells help maintain good GH+ and KH+ values. These oyster shells have a stabilizing effect on the KH and PH value. The KH indicates the carbonate hardness of the water.

Many people think that if their tap water is harder, it won't cause problems for the KH and pH of the water. KH functions much like a buffer of the acidity (pH) of water.

Fish, plants and the biological filter "consume" the hardness of the water (KH). If the water is not changed enough during the winter, for example, the KH can drop quickly. The KH also drops rapidly during rainy periods. This has big consequences for the fish, because the pH can drop suddenly.

The KH is not measured regularly enough in the basins. Only in case of problems, and therefore when it is already too late, we try to remedy the situation by adding, for example, KH+ powder. But KH+ powder has a number of disadvantages:

• a lot of powder disappears through the bottom drain / the filtrant system
• a short-term boosted effect, large fluctuations in water values
• you have to constantly measure and add powder

Oyster shells ensure total stabilization of KH and pH over the long term. Oyster shells only dissolve when the KH value drops and thus have a buffer effect on the pH.

They absolutely do not depend on the amount of rain, the change of water or the seasons: oyster shells ensure a stable level of KH and pH values ​​of the water. Only when the oyster shells are practically dissolved, it is necessary to add more. As an approximate indication, one bag of oyster shells per year for a volume of 10 m3 will suffice; the amount needed naturally depends on the factors described above.

Air-Aqua oyster shells are delivered in a net, they can be rinsed easily. Oyster shells are washed with chlorine and then dried: a guarantee of elimination of harmful bacteria, fungi and disease germs. The shells are also suitable for use as biological filter material in a drip system or in a multi-chamber system.