spanko
Active Member
http://www.advancedaquarist.com/2009/1/short
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How do I disinfect a hospital tank?
When the hospital tank is no longer needed, it should be thoroughly disinfected before storing for the next use. Many times we don't know what caused the illness and can't be sure if any pathogens are still lurking on the hospital tank surface or any of the equipment used.
There are two common solutions used to disinfect tanks: common household bleach or potassium permanganate (PP).
Empty the tank and discard any mechanical or chemical filter media (pads, floss, carbon). The biological media can be disinfected and used again. Fill the tank and add a 10 parts water to 1 part bleach solution and let it run through the filter for about an hour. Drain and re-fill with fresh water, adding 10x the normal dose of de-chlorinator and run through the filter for another hour. The tank is now ready to be drained, dried and stored.
The same process can be used with PP. Add 10ppm of PP, enough to turn the water pink (2 teaspoons of Kordon’s Permoxyn for 10 gallons will result in a 10ppm solution). Do not treat the water with any dechlorinator for three days prior to dosing PP. If you have used a dechlorinator within that time frame, keep an eye on the color of the water after adding the PP. If the pink color fades, redose another 10ppm PP to keep the water pink for the duration of the disinfection treatment. PP will also stain fabrics, fingers, etc. so be careful. After running the filter 4-8 hours in 10ppm of PP, you can deactivate it by adding hydrogen peroxide or sodium thiosulfate. This will allow you to drain the tank without worrying about staining. Just a good rinse in water is all that’s needed to finish up."
"
How do I disinfect a hospital tank?
When the hospital tank is no longer needed, it should be thoroughly disinfected before storing for the next use. Many times we don't know what caused the illness and can't be sure if any pathogens are still lurking on the hospital tank surface or any of the equipment used.
There are two common solutions used to disinfect tanks: common household bleach or potassium permanganate (PP).
Empty the tank and discard any mechanical or chemical filter media (pads, floss, carbon). The biological media can be disinfected and used again. Fill the tank and add a 10 parts water to 1 part bleach solution and let it run through the filter for about an hour. Drain and re-fill with fresh water, adding 10x the normal dose of de-chlorinator and run through the filter for another hour. The tank is now ready to be drained, dried and stored.
The same process can be used with PP. Add 10ppm of PP, enough to turn the water pink (2 teaspoons of Kordon’s Permoxyn for 10 gallons will result in a 10ppm solution). Do not treat the water with any dechlorinator for three days prior to dosing PP. If you have used a dechlorinator within that time frame, keep an eye on the color of the water after adding the PP. If the pink color fades, redose another 10ppm PP to keep the water pink for the duration of the disinfection treatment. PP will also stain fabrics, fingers, etc. so be careful. After running the filter 4-8 hours in 10ppm of PP, you can deactivate it by adding hydrogen peroxide or sodium thiosulfate. This will allow you to drain the tank without worrying about staining. Just a good rinse in water is all that’s needed to finish up."