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All of our medications are supplied in anti-tamper containers, or in bottles with built-in measures where appropriate. We do not stockpile medications, all liquid preparations are manufactured fresh on a regular basis ensuring effectiveness, using only de-ionised water and high quality 'Laboratory grade' materials. All of our preparations are true % formulations.

Ironically chemicals added to a pond intended to bring about a cure for health problems are very invasive to fish in the first place, as chemicals increase stress levels in fish.

Some chemicals can radically reduce the level of protective mucous coating on fish. Organic die-back can increase altering pH values, etc. All chemicals do have a detrimental effect on the beneficial strains of bacteria needed in the pond/filter. The level of damage done to the enclosed ecosystem is hard to quantify precisely for any given chemical. Anti-bacterial treatments are exactly that, they lower ALL bacterial levels with no discrimination, all bacteria good and bad will be affected.

After any chemical is added to the pond, water quality needs to recover and as in most cases, pollutant levels can increase.

After any pond-wide treatment, plan additional water quality monitoring. Re-boosting the filter and pond with nitrifying bacteria is very beneficial. Stopping feeding while medicating will at least reduce some of the pollutants that the "overworked" filter system has to deal with.

It is critical when adding any medication that the volume of water to be treated is known. Too much chemical can be fatal, conversely too little can be ineffective. Accurate measuring of dose rates again is just as important.

When preparing to add chemicals, pre-mix the measured quantity into a large bucket of pond water and add a quarter of the mix to the pond, waiting 30 minutes before repeating this same procedure. During this period you can monitor the fish for any adverse effects, before deciding whether or not to continue. Because of the potential for some chemicals to lower oxygen in water, never switch off any aeration, increase it if possible. Never add chemicals at night when dissolved oxygen levels are at their lowest.

When applying the chemical solution, sprinkle or disperse the chemical evenly around the pond.

Selecting the correct chemical is probably the hardest part of treating any pond! The odd "flick or flash" means you should not be rushing for the medications. Water quality parameters Ammonia, Nitrite, swings in pH, can lead to irrational action by fish keepers!

Reach for the test kits first. Test the water first before using chemicals.

Identification of parasitic infestation is almost impossible without microscopic examination. Remember a pond-wide problem like parasitic outbreak is best treated with a pond-wide medication, however to treat a whole pond of healthy happy fish bar one or two with ulcers/fungus, is seldom effective, and may be best treated by single bathing or topical treatments.



Kusuri Acriflavine 250ml

Acriflavine 1%


This medication is a liquid preparation, used as a general anti-bacterial, also useful for the treatment of external fungal infections.

Acriflavine is also reported to help in the reduction of minor viral infections. It can be used safely in salted ponds. Acriflavine can be also be used as a bath treatment.

Dosage: 10mls to 100 gallons.

For use above 11 C (55 F).
Our price : £8.99 | Members Price: £8.54
Kusuri Acriflavine 500ml

Acriflavine 1%


This medication is a liquid preparation, used as a general anti-bacterial, also useful for the treatment of external fungal infections.

Acriflavine is also reported to help in the reduction of minor viral infections. It can be used safely in salted ponds. Acriflavine can be also be used as a bath treatment.

Dosage: 10mls to 100 gallons.

For use above 11 C (55 F).
Our price : £12.49 | Members Price: £11.87
Kusuri Formalin 250ml

Sold as freshly-made 30% formulation.

Formalin is a very active chemical and is best used with Malachite for the effective treatment of most single cell parasites, including white spot, costia and some fluke infestations.

We do not recommend the use of Formalin with any salt in solution.
Our price : £8.99 | Members Price: £8.54
Kusuri Formalin 500ml

Sold as freshly-made 30% formulation.

Formalin is a very active chemical and is best used with Malachite for the effective treatment of most single cell parasites, including white spot, costia and some fluke infestations.

We do not recommend the use of Formalin with any salt in solution.
Our price : £12.49 | Members Price: £11.87
Kusuri Formalin & Malachite (FMC) 250ml

Premixed Formalin and Malachite Green.

A ready to use full strength formulation, popular as a pond-wide anti-parasite treatment. Particularly good for white spot infestations.

Do not use with salt in solution!

Use above 11 C, at 100 ml to 1000 gallons of pond water.
Our price : £14.49 | Members Price: £13.77
Kusuri Formalin & Malachite (FMC) 500ml

Premixed Formalin and Malachite Green.

A ready to use full strength formulation, popular as a pond-wide anti-parasite treatment. Particularly good for white spot infestations.

Do not use with salt in solution!

Use above 11 C, at 100 ml to 1000 gallons of pond water.
Our price : £22.49 | Members Price: £21.37
Kusuri Malachite Green 250ml

Sold as freshly made 2% solution.

Malachite can be used for the treatment of minor parasitic infestations. Mixing Formalin with Malachite is effective at treating most other microscopic parasites.
Our price : £8.99 | Members Price: £8.54
Kusuri Malachite Green 500ml

Sold as freshly made 2% solution.

Malachite can be used for the treatment of minor parasitic infestations. Mixing Formalin with Malachite is effective at treating most other microscopic parasites.
Our price : £12.49 | Members Price: £11.87
Kusuri Chloramine T 100grams

Chloramine T is a powdered product, an effective broad spectrum chemical for lowering bacteria in ponds. At higher dose rates it can be used against skin/gill flukes, white spot, Costia, etc. Commonly used as a pond-wide treatment.

Typical Dosages : 5gms per 1000 gallons as an anti-bacterial or
15-20gms per 1000 gallons as an anti parasite treatment (4 doses required).

Chloramine T can be used as a bath treatment.

For use above 11.5 C (55 F)

We supply a very high laboratory grade product.
Our price : £15.49 | Members Price: £14.72
Kusuri Chloramine T 250grams

Chloramine T is a powdered product, an effective broad spectrum chemical for lowering bacteria in ponds. At higher dose rates it can be used against skin/gill flukes, white spot, Costia, etc. Commonly used as a pond-wide treatment.

Typical Dosages : 5gms per 1000 gallons as an anti-bacterial or
15-20gms per 1000 gallons as an anti parasite treatment (4 doses required).

Chloramine T can be used as a bath treatment.

For use above 11.5 C (55 F)

We supply a very high laboratory grade product.
Our price : £25.25 | Members Price: £23.99
Kusuri Potassium Permanganate 250grams

Potassium Permanganate.


Another popular powdered chemical for various applications.

A good disinfectant for ponds and nets. Excellent for the eradication of Trichodina & Costia, and other parasites. It will discolour water for up to 7 days, and can be used down to 10 C. At higher temperatures it can remove some oxygen from water, so it is advisable to keep an airstone running within the treatment/quarantine tank.

We supply a very fine crystalline grade which is far easier to dissolve.

Dosage 6.8gms per 1000 gallons. We do not recommend the use of this chemical as a bath treatment.
Our price : £10.99 | Members Price: £10.44