Hi
I bought 2 gourami last Saturday. Yesterday I noticed a white spot on the male's head. I'm sure all was fine 3 days ago.
Take a look at this please, I think that's something serious :(
Tank (new one, 5 weeks old): 20 gallons, 4 gourami, 3 barbus tetrazona, t=24-25°C, ph 7.4, nitrites...