Hey everyone, hopefully this isn't considered necro-posting yet.
I have another question, although before I ask I can say that I finally named my little guys. Tank two has been dubbed Batman and Robin because one of them is pretty big and dark and the other one is small and red like the little sidekick. I wanted to give my lone guy in tank one a cute name so I compromised with Spidey short for Spiderman since he's red and blue.
So now my question! Spidey has been doing well, but last week I noticed a white film forming at the surface of the water. Then he had a small hole in his tail fin. I cleaned out the tank and put him in AQ salt for a couple days and his tail healed, but the white stuff has formed again. I don't know what it is. When I disturb the surface it spreads out in the water like white debris.
You can see the white pieces over the dark plant.
And when I scooped him out, it got on the cup like slime