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Colombo Lernex is an effective anti-parasite and worm treatment for pond fish, targeting skin and gill flukes, fish lice, anchor worms, and other macro parasites. Skin flukes (Gyrodactylus) are tiny parasites visible only under a microscope. They reproduce rapidly, causing skin irritation and a thick mucous layer on the fish. Infested fish often rub or flash against pond walls, stones, or pipes.
Gill flukes (Dactylogyrus) lay eggs and can infest both the body and gills of koi. They typically require two doses to eradicate adults and their young. Colombo Lernex is also effective against visible macro parasites, including fish lice (Argulus), gill lice, and anchor worms. In addition, it treats internal roundworms (Nematodes) and leeches (Piscicola Geometre), helping maintain fish health and a clean pond environment.
The recommended dosage is 1 ml per 20 litres (50 ml per 1000 litres of water). If required, repeat the treatment after 14 days. Remember to turn off the UV filter during application to ensure effectiveness. Colombo Lernex is available in 200g, 400g, and 800g packages, making it suitable for ponds of different sizes. Regular use of Colombo Lernex protects your fish from parasites, prevents infestations, and ensures a healthy and thriving pond ecosystem.
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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!



