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Koi Health - Health & Parasite info

Virkon Mick1912 10:46pm Wednesday 19th Sep [open all]
RE: Virkon JIMMY/S 3:30am Thursday 20th Sep
RE: Virkon 14TB 8:29am Thursday 20th Sep
RE: Virkon Mick1912 10:31pm Thursday 20th Sep
RE: Virkon Mick1912 10:33pm Thursday 20th Sep
RE: Virkon JIMMY/S 7:43pm Friday 21st Sep
RE: Virkon Mick1912 10:31pm Friday 21st Sep
RE: Virkon Paul Dodsworth 9:36pm Saturday 12th Oct
RE: Virkon 14TB 9:51pm Saturday 12th Oct
RE: Virkon zzmick 12:01pm Thursday 11th Mar
RE: Virkon 14TB 10:57pm Thursday 11th Mar
RE: Virkon zzmick 1:59am Friday 12th Mar


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"RE: Virkon" 9:51pm Saturday 12th Oct | message edited 2 times

joined: 6th Mar 10
last here: 7:55am Yesterday
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I believe it can be safely re-dosed full strength weekly with no adverse effect. But see below for Virkon info.

Virkon Aquatic.

Virkon has been used in animal husbandry for some 20 years or so, but is a relatively new medication as far as the Koi industry is concerned. Why are we always the last ones to catch on? Like potassium and chloramine T, Virkon is a powerful oxidising agent, but there the similarity ends.

Virkon is a ‘modern’ disinfectant that is widely used in all forms of livestock husbandry, including pigs, cattle and sheep. It is also the disinfectant of choice in the fight against bird flu and foot and mouth disease, is licensed for use with all livestock and recommended by DEFRA (formerly MAFF).

Not only is Virkon a very potent disinfectant, but is less toxic than either potassium or chloramine T. It can be used in many different ways, as a foot dip, bath or spray to disinfect all kinds of equipment, buildings cars and clothing and can of course be used in direct contact with the animal in question to kill pathogens.

The manufacturers claim that Virkon is very effective against a range of viruses as well as bacteria, and in the Koi industry this will obviously be of great interest.

Virkon is effective at all temperature ranges from 4 deg C upwards, and is also long lasting in terms of its disinfecting action. Virkon only loses 10% of its effectiveness in water after 7 days. It is non toxic to humans when mixed, although like Chloramine T it is a respiratory irritant in its raw powder form.

When it does break down in water it leaves no harmful residues, so is kinder to the environment, and lastly it is licensed for use with fish, so will be readily and widely available.

Dose: between 2 and 4 grams per ton (220 gallons) see below. Dose is dependent on water hardness. Can also be used as a drip fed constant dose to keep bacteria count low. Can be used with salt at 1/2oz per gallon.

Water Hardness: Terms and Conversion mg/l CaCO3 German Degrees of Hardness Described as Dose per 220 gallons

0 - 50 0 - 3 soft 2gm
50 - 100 03-06 fairly soft 2.5gm
100 - 200 06-12 slightly hard 3gm
200 - 300 12-18 moderately hard 3.5gm
300 - 540 18 - 30 hard 4gm
540 + 30 + very hard 4gm
1 degree of hardness = approx 18 mg/l CaCO3

Virkon Aquatic is available in a handy tablet form to make dosing easy, as well as in the raw powder form.

more great info here copy and paste the link:-

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