Top 10 Worms and Parasites for garden pond in 2026

COLOMBO - Lernex - 400g - Against fish worms

(2 reviews)

39.99 €

Colombo Lernex 400g is a treatment designed to effectively combat parasites such as skin worms, gill worms, leeches, and sea lice , it also acts against internal parasites. This powerful formula specifically targets parasites, preserving the beneficial flora and fauna of your pond . Easy to use, Lernex 400g can treat up to 10,000 liters of water , ideal for garden ponds, whether large or small. This quality treatment is a valuable ally for Koi and other ornamental fish enthusiasts, offering optimal care with ease.

• Targeted action on external and internal parasites of fish
• Advanced formula, gentle on the pond ecosystem
• Effective treatment for 10,000 liters of water

• En promotion
• 5 en stock

Colombo Lernex 400g is a treatment designed to effectively combat parasites such as skin worms, gill worms, leeches, and sea lice , it also acts against internal parasites. This powerful formula specifically targets parasites, preserving the beneficial flora and fauna of your pond . Easy to use, Lernex 400g can treat up to 10,000 liters of water , ideal for garden ponds, whether large or small. This quality treatment is a valuable ally for Koi and other ornamental fish enthusiasts, offering optimal care with ease. Targeted action on external and internal parasites of fish Advanced formula, gentle on the pond ecosystem Effective treatment for 10,000 liters of water

COLOMBO - Lernex PRO - 1000ml - Against resistant worms

(1 review)

84.99 €

COLOMBO - Lernex PRO - 1000 ml: powerful treatment against resistant worms

COLOMBO Lernex PRO 1000 ml is a premium liquid treatment designed to help ornamental fish combat skin worms, gill worms, and resistant parasites . Its professional formula targets tough infestations while remaining suitable for the overall balance of the pond when used correctly. This generous size treats up to 20,000 liters of water , making it a very practical solution for large ponds and heavily stocked systems. Easy to dose, simple to distribute in the water, and known for its comprehensive action, Lernex PRO helps maintain calmer, more active fish and a healthier aquatic environment every day.

• Effectively treats resistant worms and several parasites visible to the naked eye.
• 1000 ml format ideal for large pools up to 20,000 litres.
• Simple to use with targeted action to support fish health.

• En promotion
• 6 en stock

COLOMBO - Lernex PRO - 1000 ml: powerful treatment against resistant worms COLOMBO Lernex PRO 1000 ml is a premium liquid treatment designed to help ornamental fish combat skin worms, gill worms, and resistant parasites . Its professional formula targets tough infestations while remaining suitable for the overall balance of the pond when used correctly. This generous size treats up to 20,000 liters of water , making it a very practical solution for large ponds and heavily stocked systems. Easy to dose, simple to distribute in the water, and known for its comprehensive action, Lernex PRO helps maintain calmer, more active fish and a healthier aquatic environment every day. Effectively treats resistant worms and several parasites visible to the naked eye. 1000 ml format ideal for large pools up to 20,000 litres. Simple to use with targeted action to support fish health.

COLOMBO - Lernex PRO - 2500ml - Against resistant worms

134.99 €

COLOMBO - Lernex PRO - 2500 ml: the large-format solution against resistant worms

COLOMBO Lernex PRO 2500 ml is a professional liquid treatment designed to eliminate skin worms, gill worms, and other resistant parasites that weaken ornamental fish. Thanks to its comprehensive formula, it acts in a targeted way on difficult infestations while remaining suitable for maintaining the balance of the pond when used correctly. Its extra-large size allows it to treat up to 50,000 liters of water , making it a particularly attractive choice for large ponds, decorative ponds, or setups housing many fish. Easy to dose and simple to distribute in the water, Lernex PRO 2500 ml helps maintain more active fish, a healthier environment, and more confident aquatic health management.

• Extra large format to efficiently treat up to 50,000 litres of water .
• It acts against several resistant parasites that weaken ornamental fish.
• Simple dosage and practical use for large capacity ponds.

• En promotion
• 2 en stock

COLOMBO - Lernex PRO - 2500 ml: the large-format solution against resistant worms COLOMBO Lernex PRO 2500 ml is a professional liquid treatment designed to eliminate skin worms, gill worms, and other resistant parasites that weaken ornamental fish. Thanks to its comprehensive formula, it acts in a targeted way on difficult infestations while remaining suitable for maintaining the balance of the pond when used correctly. Its extra-large size allows it to treat up to 50,000 liters of water , making it a particularly attractive choice for large ponds, decorative ponds, or setups housing many fish. Easy to dose and simple to distribute in the water, Lernex PRO 2500 ml helps maintain more active fish, a healthier environment, and more confident aquatic health management. Extra large format to efficiently treat up to 50,000 litres of water . It acts against several resistant parasites that weaken ornamental fish. Simple dosage and practical use for large capacity ponds.