what temperature is this good for?
I did not see any temperature recommendations for use in the Virkon literature.
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5th injection will be tomorrow, the medication is here and I will treat the whole pond this Saturday. The redness is about 80% gone so Batril is working but will confirm this Saturday.
FYI, the first symptom appeared three weeks ago with the skin showing bunch of little bums look like grains of rice.
Thanks you Russ and specially Steve(ICU) for the med because I could not purchase them from California.
Good to hear the fish is getting better
Russ is right, and here is why. Fish and the bacteria and parasites that infect them are all cold blooded animals. As water temperature decreases, the fish's metabolism and immune system decreases, and the rate at which the bacteria and parasites grow and multiply decreases.
In cold water, it takes longer for the fish to eliminate products that enter the fish's body, like the injectable antibiotics, but also things that can be absorbed from the water across the gills. For products that have a narrow therapeutic window (i.e., the rage between the lowest effective dose and the lowest toxic dose), dosing the product on the same schedule in cold water as you would in warm water will cause more accumulation of the product in the fish's body in cold water, which will lead to increased risk of toxicity. Ideally, the interval between doses should be adjusted based on water temperature; however, not enough research has been done on these products to give good advice on how to adjust the dosing based on water temperature.
All products used to treat bacterial and parasitic infections kill the organisms best when the organisms are growing. In cold water, because they are growing more slowly or not at all, it takes longer to kill the organism (or, in extreme cases, the organisms cannot be killed until the water warms up). The exception to this rule are the oxidizing agents like potassium permanganate. These will kill regardless of temperature; however, any damage to the fish from these agents will take longer to heal, leaving the fish more susceptible to complications from the treatment in cold water than they would have been in warm water.
The bottom line is that regardless of what you are treating or what agent you are using to treat, treating when the water is cold is more difficult than treating when the water is warm. There are not enough data to provide adequate advise on how to dose any of the commonly used products when the water is cold.
Bump for Virkon information