White powder/slim on fish
I've noticed that my Black Molly has a white spots on its body. I'm sure that this is not ICH. These spots are small and not cotton-like so I'm not sure whether it is fungus or not. Additionally, there are larter area (almost whole head) covered in something that looks like white slim or very fine powder.
Today I found that my Rainbow Shark has similar simptoms. Both fish swim at one spot and move only when I feed, though they eat without their usual hunger.
Water parameters are normal with amonia, nitrite at zero and nitrate at 30. I change water every 7-10 days. PH
is 6.5, and temperature is 79 degrees.
What can it be and how to fight it?
72g bowfront with Emperor 400:
Gouramis: 1 Opaline, 1 Gold, 1 Dwarf
Bolivian Ram, German Blue Ram, Kribensis
1 Black and 1 Lyretail Mollies, Swordtail
Purple Spotted Gudgeon, Pictus Cat
Gold Nugget Pleco, Rainbow Shark, Silver Dollar
6 Harlequin Rasboras, 6 Long-Finned Zebra Danios, 3 Cardinal Tetras
Plants: Banana plant