Colombo Alparex is a specialist koi parasite treatment designed to control microscopic parasites that affect koi and ornamental pond fish. Parasites irritate the skin and gills of fish and, as a result, may cause flashing, excess mucus production and reduced feeding.
Many parasites remain invisible without microscope examination. For that reason, pond keepers often notice behavioural symptoms before identifying the cause. Early use of this Alparex koi treatment therefore helps reduce the risk of parasites spreading through the pond.
Many koi keepers choose Colombo Alparex when fish show symptoms linked to invisible parasites. In particular, the treatment targets organisms responsible for grey skin disease including Costia (Ichthyobodo), Chilodonella and Trichodina. In addition, the treatment can also help control White Spot (Ich) and certain fungal infections.
Colombo Alparex Parasite Treatment for Koi Ponds
This Alparex parasite treatment helps control several parasites commonly found in koi ponds.
These include:
- Costia (Ichthyobodo)
- Chilodonella
- Trichodina
- White Spot (Ichthyophthirius)
- Secondary fungal infections such as Saprolegnia
Each parasite irritates the skin or gills of koi. As a result, infected fish may produce excess mucus, flash against pond surfaces or reduce feeding.
You can read more about these parasites in our guide:
https://www.westmidlandskoiltd.co.uk/invisible-parasites-in-koi-ponds/
Symptoms That May Require Koi Parasite Treatment
Fish affected by parasites often show noticeable behavioural changes. In many cases these symptoms indicate the need for a koi pond parasite treatment.
Typical symptoms include:
- Flashing or rubbing against pond surfaces
- Lethargy or reduced activity
- Reduced appetite
- Clamped fins
- Grey or dull skin appearance
- Excess mucus production
Parasites affecting the gills may also cause rapid breathing or fish gathering near the surface.
If your koi begin flashing against pond surfaces, see our guide:
https://www.westmidlandskoiltd.co.uk/koi-flashing-diagnosis/
Colombo Alparex Dosage Guide
This Alparex treatment for koi ponds takes place over two consecutive days.
Day 1
25 ml per 1000 litres of pond water
Day 2
25 ml per 1000 litres of pond water
Always calculate the true pond volume before applying treatment.
Preparing the Pond Before Using Alparex Treatment
Prepare the pond correctly before dosing.
First turn off UV clarifiers. Next remove activated carbon or chemical filtration media. Then increase aeration to maintain strong oxygen levels. Finally ensure water circulates properly throughout the filtration system.
Maintaining good water quality also supports fish health during parasite treatment. You can read our water quality guide here:
https://www.westmidlandskoiltd.co.uk/koi-pond-water-quality/
Manufacturer Information
Further information about Colombo Alparex is available from the manufacturer:
Professional Advisory
West Midlands Koi Ltd provides treatment information for general pond management guidance only. Always confirm pond volume and parasite diagnosis before applying treatments.
