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Koi Doc Filter Starter Bacteria Gel balls, Large 4CM 1 LitreKoi Doc Filter Starter & Pond Maintenance Bacteria Gel Balls are a high-quality pond maintenance solution designed for koi and ornamental fish ponds. These 1-litre gel balls contain a concentrated mix of Nitrosomonas and Nitrobacter bacteria, which actively reduce harmful ammonia and nitrite levels in pond water.
Koi Doc Filter Starter Bacteria Gel Balls work effectively in water temperatures from 8°C, supporting biological filtration and preventing clogging of pond filters. Regular use of Koi Doc Filter Starter Bacteria Gel Balls improves water clarity, breaks down organic waste, and promotes a healthy environment for fish and aquatic plants.
The formula is highly concentrated, containing approximately one billion colony-forming units, making it one of the most effective filter starters available. These gel balls are ideal for establishing new ponds or maintaining existing pond filtration systems. By adding Koi Doc Filter Starter Bacteria Gel Balls regularly, pond keepers can optimize the pond’s ecosystem, reduce water toxicity, and ensure a thriving, clean, and healthy aquatic environment.
Koi Doc Filter Starter Bacteria Gel Balls provide a simple, reliable, and efficient way to enhance pond water quality year-round, supporting the natural balance of beneficial bacteria in your filter media while keeping your koi happy and healthy.
Slow Release
Bacteria are slowly released over upto 6 weeks. Koi Doc gel balls support the biological filtering process contributing to a healthy and stable environment.
Ammonia Control
High levels of Ammonia in you water can cause your koi gill damage, stress and even death. Koi Doc Gel balls release good bacteria to boost filtration and breakdown Ammonia.
Nitrate Control
High levels of Nitrates in your pond can be haremful to your koi as it can prevent the transport of oxygen in the blood. The Koi Doc gel balls break down excess Nitrates.
Crystal Clear Water
By regularly using Koi Doc Gel balls in your ponds filtration system, you will be promoting a well balanced pond environment, safe for your koi and with crystal clear waters to enjoy them.
Beneficial Bacteria
Koi Doc Gel balls are crammed with over 8,000,000,000 benefitial bacteria per litre which are essential to fish health, pond health and keeping your filtration system working at its best.
Source of Enzymes & Amino Acids
Koi Doc Gel balls are full of enzymes in the form of amino acids. These are specialised biological protein catalysts which accelerate essential chemical reactions within living organisms.
Waste Management
Uneaten food, waste and organic matter will quickly lead to murky water and increased nitrate levels. The good bacteria and enzymes found in Koi Doc Gel balls make quick work of breaking this down leaving your water clear.DosageFilter start applications:
250ml of the container per 10,000 Litres of pond water. These gel balls can be added directly to the pond or the biological filtration unit.
Note:
Ensure the water temperature is at least 10°C; if below 10°C, double the dosage. It is not possible to overdose with this product.
Maintenance dose:
The frequency you need to replace the Koi Doc Gel balls depends on the water temperature. At temperatures below 10°C they remain active for about six weeks, at 15-20°C about four weeks, and at water temperatures above 25°C they work for about two weeks. After this period, the gel balls can be easily replaced for optimal results.
Not for human consumption. Keep out of reach of children.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!



