Kusuri recommend NOT using Potassium Permanganate with salt.
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Description
Kusuri Potassium Permanganate 100grm is a powdered chemical for various applications. Also a good disinfectant for ponds and nets. Excellent for the eradication of Trichodina & Costia, and other parasites. Switch off UV Sterilizer.
It will discolour water to Purple for up to 7 days, and can be used down to 10°C (50°F).
At higher temperatures Potassium Permanganate removes oxygen from pond water, it is advisable to keep an air stone running and add more air if possible. Dosage 6.8gms per 1000 gallons (4546 Litres) of pond water. Do NOT overdose. Over dosing can cause fish fatalities Do not use below 10°C (50°F).