Medication

Colombo Bactuur Activator 500 ml – accelerator of biological balance in pond and filter

Bactuur Activator 500 ml by Colombo is a high-quality activator specially developed to stimulate the activity of beneficial bacteria in ponds and filters. This product supports the rapid and effective establishment of the biological process and is particularly suitable for both new ponds and existing systems that need extra support. This makes it a practical choice for pond owners who actively work towards a stable and healthy water system.

Stimulates the activity of beneficial bacteria

In a well-functioning pond, bacteria play a crucial role in breaking down organic waste such as fish waste, excess food, and other pollutants. Colombo Bactuur Activator provides these bacteria with the right nutrients and stimulants, allowing them to develop more quickly and become more active. This results in more efficient waste breakdown and supports a more stable water quality.

Supports the rapid establishment of biological balance

A good biological balance is essential for clear and healthy pond water. By stimulating bacterial activity, Bactuur Activator 500 ml helps to get the biological process up and running more quickly and keep it better balanced. This makes the product particularly suitable when the water system needs support to function stably again.

Ideal after filter cleaning, water changes, or fluctuating water parameters

The product is particularly suitable for use after filter cleaning, a water change, or during fluctuating water parameters. In these types of situations, the biological balance can temporarily be disrupted. By using Bactuur Activator, the recovery process is supported and the filter system can return to optimal function more quickly.

Helps break down waste more efficiently

Because beneficial bacteria become more active, the natural breakdown of organic material in the pond and filter is supported. This helps keep the water system cleaner and contributes to a better-managed pond environment. This makes the product a valuable addition to regular maintenance and biological filter management.

Easy to dose and fast-acting

Thanks to its liquid formulation, Bactuur Activator 500 ml is easy to dose and fast-acting. The product can be added directly to the pond water or to the filter. For optimal performance, a well-functioning filter system with sufficient oxygen supply is important.

Supports clear water and a healthy environment

By strengthening the biological process, this product contributes to clearer water and a healthier environment for fish and plants. This makes it a reliable solution for pond owners striving for a stable biological balance, better water quality, and a sustainable pond environment.

Sera Pond Omnisan – Effective Conditioner Against Mold and Parasites in the Pond

Sera Pond Omnisan is a powerful and reliable water treatment product specially developed to effectively combat a wide range of parasitic infections and molds in ponds. The product is ideal for use with ornamental fish such as koi and goldfish and helps maintain a healthy and safe environment, especially during periods when fish are vulnerable to diseases.

Sera Pond Omnisan successfully targets common pathogens, including:

• Ichthyophthirius multifiliis (white spot)

• Ichthyobodo necator

• Apiosoma

• Tetrahymena

• Trichodina

• Chilodonella

• And various forms of mold (such as Saprolegnia)

What makes this product special is its excellent tolerance for both fish and pond plants. Unlike many aggressive treatments, Omnisan barely affects the pond's biological balance, making it safe for long-term use in a well-maintained pond environment.

The product is easy to administer and works quickly. Timely treatment with Sera Pond Omnisan can prevent or combat serious diseases in pond fish, supporting their resistance and significantly increasing the chances of recovery.

Available sizes and dosages:

• 250 ml – for ponds up to 5,000 liters

• 500 ml – for ponds up to 10,000 liters

• 5,000 ml – for ponds up to 100,000 liters

Use Sera Pond Omnisan at the first signs of disease or preventively during periods of increased risk, such as temperature fluctuations, stress, or the introduction of new fish. This helps keep your pond healthy, clear, and free from harmful parasites and molds.

Sera Pond Omnisan 5000 ml is a professional water treatment product designed to effectively combat parasites and fungi in koi and pond fish. The product is used for common ailments such as white spot, skin parasites, and fungal infections, and works quickly to prevent further spread.

Factors such as temperature fluctuations, stress, or overcrowding can reduce the resistance of fish. Sera Pond Omnisan addresses this directly by eliminating pathogens and supporting the natural resistance of fish.

• Combats parasites such as Ichthyophthirius (white spot) and Trichodina
• Effective against fungi and bacterial infections
• Suitable for ponds up to approx. 100,000 liters
• Safe for fish and pond plants when used correctly
• Also works as a disinfectant for wounds

The product stands out due to its broad spectrum of action and good tolerance. Unlike aggressive medication, it barely affects the biological balance of the pond, making it also suitable for use in stable ecosystems.

Strategically, this product is essential during disease outbreaks or for preventive use during high-risk periods (spring/autumn). It minimizes fish mortality and protects the investment in koi through quick and effective intervention.

250 ml for 5,000 liters
500 ml for 10,000 liters
5,000 ml for 100,000 liters

Pond Omnisan 250 ml – Sera

Pond Omnisan 250 ml is a versatile pond treatment specially developed to support the health of pond fish. The product is used for a variety of problems such as bacterial infections, parasitic diseases, and fungal growth, making it suitable for both preventive and curative use.

The composition of Pond Omnisan works effectively against harmful pathogens and helps speed up the recovery process of fish, especially after stressful situations such as transport, temperature fluctuations, or changes in water quality. By reducing pathogens, the pressure on the fish's immune system is lowered, which contributes to a faster and more stable recovery.

Pond Omnisan is easy to dose and suitable for use in various ponds, including ornamental ponds and koi ponds. When used correctly, the product supports a healthy and balanced pond environment, without unnecessarily disrupting the biological balance.

In short, Pond Omnisan 250 ml from Sera is a reliable and professional solution for pond enthusiasts who want to actively contribute to the health, vitality, and resistance of their pond fish.

Anti-Parasite 1000 ml (50,000 liters pond water) – Koidokter

Koidokter Anti-Parasite is a powerful and effective remedy against the most common single-celled parasites in the pond. The active ingredients – Formaldehyde 40% in combination with Malachite Green – control, among others, White Spot (Ichthyophthirius), Costia, Trichodina, Chilodonella and are also effective against fungal infections in pond fish.

This treatment is intended for ponds with a volume of up to 50,000 liters and can be used as a curative treatment for visible parasitic symptoms or to support overall fish health.

Note: this product must not be combined with salt (>3 g/l) and may only be used at water temperatures above 8°C. During treatment, good aeration is essential, and the filter should remain running. UV and ozone systems must be switched off for 2 days.

Dosage and use:

• 20 ml per 1,000 liters of pond water

• For White Spot: repeat the treatment after 4 days

• After 7 days: change approx. 20% of the water

• Use only 80% of the dose if the pH is lower than 7

Safety instructions:

• Do not swallow or inhale

• Use only outdoors or in well-ventilated rooms

• Always wear: protective gloves

• In case of contact with skin or eyes: rinse thoroughly with water and seek medical advice

• Store in the original packaging, cool and dark

• Keep out of reach of children and pets

• Toxic if in contact with skin, ingested or inhaled

Important note:
After the course of treatment, it is recommended to administer Malamix17. This product restores the protective slime layer of the fish and stimulates the filter bacteria, which contributes to a rapid recovery of the pond environment.

Liability:
Koidokter and MaJa Koi cannot be held liable for damage to fish or the pond as a result of incorrect use of this product. Always read and carefully follow the instructions on the label.

Contents: 1000 ml – sufficient for 50,000 liters of pond water

Anti-Parasite 500 ml (for 25,000 liters of pond water) – Koidokter

The Anti-Parasite treatment from Koidokter is a powerful solution for combating the most common single-celled parasites in pond water. This treatment liquid contains an effective combination of 40% Formaldehyde and Malachite Green, which together provide thorough control of, among others, White Spot (Ichthyophthirius), Costia, Trichodina, Chilodonella and various fungal infections.

This 500 ml package is suitable for treating ponds up to 25,000 liters of water. Thanks to its powerful effect, one treatment is sufficient in most cases. For White Spot, a repeat treatment after 4 days is recommended for complete results.

The treatment is exclusively suitable for water temperatures from 8°C. During use, the pond must be well aerated, and the filter system must remain running. Temporarily turn off the UV and ozone equipment (for 2 days). After 7 days, it is recommended to refresh approx. 20% of the pond water.

Dosage and use:

• 20 ml per 1,000 liters of pond water

• Use only 80% of the dose when the pH is lower than 7

• Do not use in combination with salt (> 3 g/l)

• Never mix with other chemical substances

Safety and warnings:

• Use only outdoors or in well-ventilated rooms

• Do not swallow or inhale

• Wear protective gloves

• Avoid contact with skin and eyes

• In case of contact: rinse immediately with plenty of water and seek medical advice

• Toxic if inhaled, swallowed, or in contact with skin

• Keep cool, dark, and out of reach of children and animals

• In case of accident, take the packaging with you and consult a doctor

Aftercare advice:
After treatment, the use of Malamix17 is highly recommended. This natural product supports the recovery of the mucous membrane of the fish and helps with the restarting of the filter bacteria, which is essential for a healthy pond balance.

Contents: 500 ml – suitable for 25,000 liters of pond water
Brand: Koidokter

Liability:
Koidokter and MaJa Koi cannot be held liable for damage to fish or the pond due to improper use. Always read the instructions for use carefully.

Anti-Parasite 250 ml – For 12,500 Liters of Pond Water – De Koidokter

The Koidokter Anti-Parasite 250 ml is an effective remedy for controlling the most common single-celled parasites and fungal infections in the pond. This treatment is formulated with 40% Formaldehyde and Malachite Green, a proven combination that is effective against, among others, White Spot (Ichthyophthirius), Costia, Trichodina and Chilodonella.

This product is suitable for ponds up to 12,500 liters of water and works quickly and effectively when applied correctly. The remedy does not harm the filter bacteria as long as the filter system continues to run and is safe at the recommended dosage, provided the instructions are followed carefully.

Dosage and use:

• 20 ml per 1,000 liters of pond water

• Do not use at water temperatures below 8°C

• Use only 80% of the dosage when pH < 7

• For White Spot: repeat the treatment after 4 days

• During treatment: switch off UV and ozone systems (2 days)

• Ventilate well and keep the filter system running

• After 7 days: change approximately 20% of the water

• Do not combine with other chemical products

• Do not use in combination with salt (> 3 g/l)

Safety & storage:

• Use only outdoors or in a well-ventilated area

• Do not swallow or inhale – toxic if it comes into contact with the skin, eyes or mucous membranes

• In case of contact: rinse thoroughly with water and seek medical advice

• Store in the original packaging, in a cool and dark place

• Keep out of reach of children and pets

• Always wear protective gloves during use

Aftercare advice:
For optimal recovery of the mucous membrane and support of the filtration process, the use of Malamix17 is recommended after treatment. This natural product stimulates the production of mucus and promotes a healthy bacterial balance in the pond.

Contents: 250 ml – suitable for 12,500 liters of pond water
Brand: De Koidokter

Please note:
De Koidokter and MaJa Koi cannot be held liable for damage caused by the incorrect use of this product. Always read the instructions carefully before use.

Colombo Morenicol Lernex 400 g – Effective parasite control for pond fish

Colombo Lernex is a professional medicine for controlling various parasitic diseases in pond fish. This 400-gram package is suitable for medium-sized ponds and offers a powerful solution against, among others:

• Skin worms (Gyrodactylus)

• Gill worms (Dactylogyrus)

• Anchor worms (Lernaea)

• Leeches

• Fish lice (Argulus)

• Internal worms

The medicine contains modern, well-researched active ingredients such as levamisole and praziquantel, which are known for their high effectiveness and safety when used on pond fish. Lernex has been successfully used for years by both hobbyists and professionals to improve fish health and prevent mortality.

Use and dosage:

• 400-gram package, ideal for ponds with an average water volume

• 1 gram per 25 liters of pond water (consult the packaging for the exact dosage)

• Apply in case of symptoms such as rubbing, flashing, lethargy, or labored breathing

• Do not use below 10°C

• Ensure good aeration during treatment

• Do not combine with other medicines without advice

Important tip:
Always test the pond water parameters first before treatment, such as pH, ammonia, nitrite, and temperature. Poor water quality is often the primary cause of fish diseases and can affect the effectiveness of medicines. The treatment will only have the desired effect if the water parameters are correct.

Please note:
Use of this product is at your own risk. MaJa Koi and Colombo accept no liability for any fish mortality or other damage caused by incorrect use.

Why choose Colombo Lernex 400 g?

• Broad-spectrum action against external and internal parasites

• Reliable and proven effectiveness

• Easy to apply

• Suitable for use with koi and ornamental fish in ponds

Protect the health of your fish with Colombo Lernex – a powerful and safe choice for a parasite-free pond environment.

Product content – Morenicol Cytofex 500 ml – Colombo

Morenicol Cytofex is a professionally developed treatment for pond fish specifically aimed at combating bacterial infections. The product is used for visible symptoms of disease such as inflammation, ulcers, fin rot, and other bacterial conditions that affect the health and vitality of fish.

The active composition of Morenicol Cytofex specifically targets harmful bacteria and supports the fish's natural recovery ability. Timely application limits the further spread of infections and significantly reduces the chance of loss. This makes the product particularly suitable for both curative use in acute cases and controlled treatment within a professional pond management plan.

Cytofex is designed for use in ornamental ponds and koi ponds and can be safely applied when the instructions are carefully followed. During treatment, the biological balance of the pond is stressed as little as possible, while the focus remains on restoring fish health. The product works effectively in various water conditions and is suitable for larger pond volumes thanks to the 500 ml packaging.

Treatment with Morenicol Cytofex contributes to:

• Targeted control of bacterial infections

• Faster recovery of affected fish

• Limitation of disease spread

• Improvement of overall fish condition

• Support of a stable pond environment

For optimal results, it is recommended to apply the product at the first symptoms of bacterial problems and to closely monitor the water quality during the treatment period. Morenicol Cytofex 500 ml thus positions itself as a reliable and effective solution for pond owners who aim for control, fish health, and professional maintenance.

Colombo Alparex is a koi medication that is effective against invisible parasites that cause a grey veil on the fish, such as Ichthyobodo, Chilodinella and Trichodina. Symptoms of an infestation with these parasites include lethargy, rubbing, and a reduced appetite. In the case of a severe fungal infection in combination with the above-mentioned invisible parasites, Alparex is also a suitable remedy.

Water quality: For optimal effectiveness of Morenicol Alparex and a quick recovery of sick fish, good water quality is essential. Therefore, always test the water quality before and after treatment and correct where necessary. KH is particularly important: it should be between 6 and 8°dH before starting the treatment.

Dosage: The product Alparex must be administered in two steps: 1st day: 1 ml per 40 liters of pond water, i.e. 25 ml per 1000 liters of pond water. 2nd day: again 1 ml per 40 liters of pond water, i.e. 25 ml per 1000 liters of pond water. A measuring cup is included in the packaging.

Dosage for Siamese fighting fish: Siamese fighting fish may tolerate Alparex less well in some cases. At the same time, due to their hard skin, they are also less sensitive to the parasites against which Alparex is active. We therefore advise not to treat Siamese fighting fish with it, but separately with only half the dosage (2 days 1 ml per 80 liters of pond water instead of 2 days 1 ml per 40 liters). If necessary, this treatment can be repeated a third time on the third day.

Use: Measure out the required amount in the measuring cup and pre-mix it in a watering can or a bucket with water. Then distribute evenly over the pond. Do not filter through carbon or zeolite; keep UV lamps and ozone devices switched off for up to 1 week after the last administration.

Combinations: Morenicol Alparex and Cytofex Pro can be combined at full dosage. There should be at least 2 weeks between the use of Morenicol Alparex and Colombo Algadrex, Lernex and FMC-50. Combinations with other products are strictly at your own risk!

Warning: As far as known, this product is harmless to aquatic animals such as frogs, salamanders, crayfish and snails. If you have positive or negative experiences, report them to us via www.colombo.nl or email: info@colombo.nl. For use with ornamental fish in ponds only. Keep in the packaging and out of reach of children between 4 and 32°C. Do not inhale. Avoid contact with skin and eyes. In case of ingestion, consult a doctor immediately and show the packaging or label. This product causes permanent stains on clothing, paving, etc.

MaJa Koi accepts no liability if problems or mortality occur after the use of the medicines.
This is entirely at the buyer's risk.

Colombo Alparex is a koi medication that is effective against invisible parasites that cause a grey veil on the fish, such as Ichthyobodo, Chilodinella and Trichodina. Symptoms of an infestation with these parasites include lethargy, rubbing, and a reduced appetite. In the case of a severe fungal infection in combination with the above-mentioned invisible parasites, Alparex is also a suitable remedy.

Water quality: For optimal effectiveness of Morenicol Alparex and a quick recovery of sick fish, good water quality is essential. Therefore, always test the water quality before and after treatment and correct where necessary. KH is particularly important: it should be between 6 and 8°dH before starting the treatment.

Dosage: The product Alparex must be administered in two steps: 1st day: 1 ml per 40 liters of pond water, i.e. 25 ml per 1000 liters of pond water. 2nd day: again 1 ml per 40 liters of pond water, i.e. 25 ml per 1000 liters of pond water. A measuring cup is included in the packaging.

Dosage for Siamese fighting fish: Siamese fighting fish may tolerate Alparex less well in some cases. At the same time, due to their hard skin, they are also less sensitive to the parasites against which Alparex is active. We therefore advise not to treat Siamese fighting fish with it, but separately with only half the dosage (2 days 1 ml per 80 liters of pond water instead of 2 days 1 ml per 40 liters). If necessary, this treatment can be repeated a third time on the third day.

Use: Measure out the required amount in the measuring cup and pre-mix it in a watering can or a bucket with water. Then distribute evenly over the pond. Do not filter through carbon or zeolite; keep UV lamps and ozone devices switched off for up to 1 week after the last administration.

Combinations: Morenicol Alparex and Cytofex Pro can be combined at full dosage. There should be at least 2 weeks between the use of Morenicol Alparex and Colombo Algadrex, Lernex and FMC-50. Combinations with other products are strictly at your own risk!

Warning: As far as known, this product is harmless to aquatic animals such as frogs, salamanders, crayfish and snails. If you have positive or negative experiences, report them to us via www.colombo.nl or email: info@colombo.nl. For use with ornamental fish in ponds only. Keep in the packaging and out of reach of children between 4 and 32°C. Do not inhale. Avoid contact with skin and eyes. In case of ingestion, consult a doctor immediately and show the packaging or label. This product causes permanent stains on clothing, paving, etc.

MaJa Koi accepts no liability if problems or mortality occur after the use of the medicines.
This is entirely at the buyer's risk.

The Colombo Morenicol FMC-50 1000 ml is a powerful and reliable medicine specially developed for the treatment of common diseases in koi and ornamental fish. The medicine is particularly effective against white spot (Ichthyophthirius multifiliis), fungal infections, and various types of skin parasites such as Trichodina and Costia. These problems occur regularly in ponds and can cause serious damage to the health of fish if they are not treated in time.

White spot is a parasitic disease that spreads quickly and is recognizable by small white spots on the skin, fins, and gills of fish. Fish with this disease often exhibit rubbing behavior and are listless. Without treatment, white spot can lead to high mortality within a short time. Fungal infections, on the other hand, often occur secondarily, for example after injuries or stress, and appear as white or fluffy patches on the skin. Skin parasites such as Trichodina or Costia cause irritation, respiratory problems, and stress, which further weakens the resistance of fish.

The active ingredients in Morenicol FMC-50 are carefully formulated to combat these conditions quickly and effectively. As soon as the medicine is added to the pond water, it spreads evenly and comes into direct contact with the parasites and pathogens. This ensures a rapid reduction in the infection pressure and gives the fish a chance to recover. Often, a clear improvement is visible after just a few days: fish become more active, eat better, and show less stress behavior.

An important advantage of Colombo FMC-50 is that it, if applied correctly, does not affect the beneficial bacteria in the biological filter system. This keeps the balance in the pond and allows the treatment to be carried out safely without negative effects on the ecosystem. This makes the medicine not only effective, but also reliable to use.

The contents of 1000 ml is ideal for medium-sized ponds and provides enough product for multiple treatments, depending on the pond size and the severity of the infection. Thanks to the high concentration of active ingredients, this medicine is highly efficient, allowing pond owners to achieve great results with a relatively small amount.

The Colombo Morenicol FMC-50 1000 ml was developed based on years of experience and expertise in pond care and fish health. It is used worldwide by both hobbyists and professional breeders because of its reliable performance. By having this product at home, you are prepared for acute situations and can intervene quickly as soon as your fish show signs of illness.

In short: with the Colombo Morenicol FMC-50 1000 ml, you choose a powerful, effective, and safe medicine that protects fish against white spot, fungal infections, and skin parasites. The medicine not only helps combat existing problems, but also supports the recovery and overall resistance of the fish. This keeps your pond healthy, clear, and a safe living environment for all your fish.