Colombo KH Test – Precise carbonate hardness test for stable pond water

Take a water sample from the pond using the included test tube. Add the test reagent drop by drop according to the enclosed instructions and shake the test tube after each drop. The number of drops required until the color of the solution changes corresponds to the KH value in °dH. To ensure stable water values, the carbonate hardness should be checked regularly. An optimal KH value is between 6 and 10 °dH. If the value is too low, it can be adjusted using special KH stabilizers. Regular use of this test helps to detect fluctuations early and keep the water quality in the pond at an optimal level.

Regularly check the carbonate hardness in the pond, especially during pH fluctuations or after water changes.

Test reagents for determining carbonate hardness in freshwater.

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Processing Time & Shipping
Orders are generally processed within 1–3 business days.

Shipping within Germany:
Standard: 2–4 business days, €5.90 (free from €49)
Express: 1–2 business days, €12.90

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Shipping to France & Italy:
0–5 kg: €13.90, 2–8 business days
5–10 kg: €14.90, 2–8 business days
0–25 kg: €19.90, 2–8 business days
25–30 kg: €24.90, 2–8 business days

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You have the right to withdraw from this contract within 14 days without giving any reason. The period begins as soon as you, or a third party designated by you, have received the goods. To exercise your right of withdrawal, please send us (Koi-Area GbR, Tomphecke 25, 41169 Mönchengladbach, Tel: +49 152 27783926, E-mail: info@koi-area.de) a clear statement, e.g., by mail or e-mail. A model withdrawal form is available, but not mandatory. To meet the deadline, it is sufficient to send your notification in time.

Consequences of Withdrawal
Upon receipt of your withdrawal, we will refund all payments, including standard shipping costs, within 14 days. The refund will be made using the original payment method unless otherwise agreed. We may withhold the refund until we have received the goods back or provided proof of return.

Returning the Goods
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Exceptions to the Right of Withdrawal
Withdrawal is excluded for custom-made or unsealed goods that cannot be returned for hygiene reasons.