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Koi Doc KH Buffer Carbonate Hardness Booster Perfect Pond Water TreatmentKoi Doc KH+ is a high-quality carbonate hardness (KH) supplement designed to help maintain a stable pond environment. KH is essential for pH stability and provides the buffering capacity your pond needs to resist sudden changes caused by rainfall, heavy feeding, bacterial activity, or seasonal shifts.
A steady KH level supports a healthy, efficient biological filter by helping beneficial bacteria perform consistently. When KH becomes depleted, ponds can become vulnerable to rapid pH swings and “pH crash” events that place fish under stress and can quickly destabilise water quality.
Regular KH testing and maintenance is one of the simplest and most effective ways to keep koi and pond fish thriving, especially during periods of high filter activity, warmer months, or after large water changes.
Essential Treatment
Koi Doc KH+ strengthens your pond’s buffering capacity, helps prevent pH crashes, is fast dissolving and easy to use, works all year round, helps your benefitial bacteria and is fish and plant safe.
Safe for plants, fish and microorganisms
When used as directed, Koi Doc KH+ is safe for koi, pond fish, plants, and beneficial microorganisms. This is ideal for routine maintenance and ongoing care.
Helps Stabilises pH Levels
KH acts as a “shock absorber” for pH changes. KH+ helps reduce day-to-day pH fluctuation and supports pond stability and health over time.
Stable, Healthy Pond
Koi Doc KH+ allows you to easily keep you carbonate hardness in your desired range of normally 7–9° dKH which facilitates healthy conditions for fish, plant, bacteria and microorganism life in your pond.
Supports Filter Performance
Koi Doc KH+ helps protect beneficial bacteria which rely on stable conditions. Maintaining KH helps your biological filter work consistently, supporting clearer water and steadier water quality.
Powerful Buffering Support
Koi Doc KH+ strengthens your pond’s buffering capacity to help keep water parameters stable and predictable, supporting a healthier pond environment and helping to prevent pH swings.
Works All Year Round
KH demand can change with feeding, filter load, rainfall, and season. Koi Doc KH+ is suitable for year-round use, including after water changes and during peak biological activity.Dosage: 25g of KH+ will raise approximately 1,000 litres of pond water by 1° dKH. For regular replenishment and stabilisation, use 10g per 1,000 litres of pond water. Always test KH and pH before and after dosing, and adjust to your pond’s needs.
Do not use in combination with GH+
Instructions: Dissolve the required amount of KH+ in a bucket of pond water. Once fully dissolved, pour evenly around the pond perimeter in areas of good circulation. Retest KH and pH after the water has mixed thoroughly. For best results, maintain KH as part of your regular pond care routine.
Increase KH gradually and avoid sudden parameter changes.
Not for human use. Keep out of reach of children and store sealed in a cool, dry place.About Koi Doc Koi RangeKoi Doc by Queni Koi Southern provides a select range of premium quality water treatments that are as good as the market leaders at a far more competitive price.All of these products have been extensively tested and manufactured to the highest standards to ensure you have water treatments that are safe to use, provide the best in class results that are safe and trusted. In many cases our prices are under half that of the equivalent products from other brands with similar, the same or better results.All of our koi including dozens of show winners supplied by Queni Koi over the years have been kept in waters treated with the Koi Doc range of products. The well established Koi Doc range of water treatments are trusted by thousands of koi keepers who return time after time to ensure the water their koi are kept in is well balanced and optimum conditions to allow their koi to thrive.Only the highest quality materials have been used in the manufacture of these water treatments to ensure the best possible results giving your koi the best possible chance to live a healthy and long life. Koi Doc water treatments are of the highest quality, trusted, proven over years of customer use and value for money.
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What types of products do you offer?
At Queni Koi Southern, we provide a curated selection of high-quality pond supplies and premium koi food. Our products include innovative items like the Sinking Air Line for seamless pond aeration and advanced koi food such as the JPD Shogun, designed to enhance the health and vibrancy of your koi.
How can I ensure the well-being of my koi?
To promote the well-being of your koi, it's essential to provide them with high-quality food and maintain a healthy pond environment. Our expertly formulated koi food under the trademarked brand Kenko Koi food and our pond supplies are designed to support the health and vibrancy of your aquatic life, ensuring your pond remains a thriving ecosystem.
What is your shipping policy?
We pride ourselves on prompt delivery! We offer free next working day delivery on orders over £100, and we use trusted carriers to ensure your products arrive safely and on time. For more details, please check our shipping policy on our website.
What should I do if I receive a damaged or incorrect product?
If you receive a damaged or incorrect product, please contact us at orders@queni-koi.co.uk as soon as possible. We will replace the product free of charge and cover the return shipping costs for the incorrect or damaged item.
Can I return koi or specially made products?
Unfortunately, once koi have left our premises, we cannot accept any responsibility for them, and they cannot be returned. Additionally, specially made products, such as custom filtration systems, can only be returned if they are faulty or damaged.
How do I cancel my order?
If you wish to cancel your order, you can do so within 14 days of receiving your products. Please contact us at orders@queni-koi.co.uk for authorization.
What is your refund policy?
We will refund all sums paid by you if the items are returned in the condition they were sent. Please allow up to 3-5 days for us to process your return once we receive the items back.
How can I contact customer support?
You can reach our customer support team by emailing us at sales@queni-koi.co.uk or by calling us at 0116 2677053. We're here to help!
