Hello,
I just noticed my black molly is acting a little lethargic and has this white fuzz around its mouth!
I cleaned the 20 gallon tank 3 days ago, like I do every 6 weeks or so. I added about 5 teaspoons of aquarium salt during the 50% water change.
I decided it was time to clean the large rocks this time since green algae was building up on them. I put them in the dishwasher with a splash of clorox. It didn't really work. I made sure to rinse them with tons of water prior to putting them back into the tank.
Could this be columnaris?
Thanks for any help!