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What is the KH value?
KH stands for carbonate hardness. It indicates the amount of carbonic acid (CO₂)-binding carbonates and bicarbonates present in the pond water. These substances form the water's buffering capacity, preventing acidification and keeping the pH stable. If the KH value is too low, the pH can fluctuate significantly—which poses a risk to fish, plants, and the biological balance.
Why use KH Plus?
When the KH value falls below the recommended limit (e.g., below approximately 4–6 °dH), the pond water is vulnerable to acidification. By adding KH Plus, you can increase the KH in a controlled manner. A correct KH value supports oxygen-producing plants, prevents pH crashes, and ensures a stable ecosystem.
Who is KH Plus suitable for?
KH Plus is suitable for all types of ponds—from small ornamental ponds to larger koi ponds or swimming ponds—where the KH value is low or the risk of acidification is high. It is an essential product for pond enthusiasts who want to maintain a clear water environment and healthy plants.
Usage & tips
First, measure the KH value of the pond water with a reliable test kit . If you determine that the KH is too low, add KH Plus according to the dosage on the package. Ideally, administer in low light and spread the solution evenly over the water surface. Check the KH value again after 24-48 hours to see if the increase has been achieved. Be careful not to overcorrect: a too high KH is less often a problem, but a sudden large increase or adding multiple products simultaneously (such as GH Plus ) can lead to unforeseen chemical reactions.
Key benefits at a glance
Increases the carbonate hardness of the water, preventing pH fluctuations. Supports the growth of oxygen-producing plants and stabilizes the pond environment. Easy-to-use product—measure → dose → check. Ideal for ponds where water changes, rainwater, or other factors have lowered the KH value. With the correct application of KH Plus, you lay the foundation for a healthy, stable, and clear pond. Visit the category page for the full range and the correct size for your pond.
