Fin Rot, Fungus And Ich

[Delloy12]

I found that these three are probably the most common diseases/ infections. I don't have any diseases in my tank but if I had any three of the above, how would I get rid of them?
I am interested in the natural and chemical ways.

 

[Caprichoso]

Natural way -daily, 25% water changes initially, then taper off to 50% weekly and weekly gravel vac(if it applies)