Soak nets in Net Soak . A light gray cottony growth anywhere on the fish. Soak nets in Net Soak . Aeromonas salmonicida parasite. Use heavy aeration to clean up dead parasites.
Skin looks gray in patches.
Use Zeemax , Binox , or Fungus Eliminator . Soak nets in Net Soak . Fish scrape on objects. Use heavy aeration to clean up dead parasites. Tiny tree-like crystals on fins or body.