[lee250]

I noticed the other day that one of my red rainbow fish has this big puffy white spot on it. Any idea what it is and what I can do about it?

 

[Nordic]

That looks like a tumor of some kind.

 

[DavidZ]

Could be as stated above, I would do a PP dip

 

[lee250]

I'm not up to date on all the abbreviations. What is PP dip

 

[DavidZ]

Potassium Permanganate