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Potassium permanganate colour...

peaches

Member
Joined
29 Dec 2008
Messages
255
Location
Yorkshire - Gods own county
I have emptied a tank I had some mystery deaths in. After taking all the plants out. I added potassium permanganate thinking it would kill any pathogens. It was pink. The colour has gone. Why? Could it be the carbon sponge? Shall I remove it and add more?
 

Simon Cole

Member
Joined
25 Dec 2018
Messages
672
Location
Buckingham
As it oxidises you get potassium ions and manganate ions. This is normal because it oxidises organic molecules. I would do as above.
 
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