I bought two of my tanks a new plant each this past week, and so far, I've already lost one fish (my yellow CT Helios...he died sometime overnight) and my marble VT Goober is also sick. I don't know if it's the plants or the snails that came off said plants that are making my fish sick, but I'm thinking that it's the plants (I took some of the snails and put them in Root Beer's tank, with no plant, and so far he's shown no symptoms of being sick like the other two did).
Goober was acting like Helios was (hiding in the ornaments and being listless with clamped fins), and I also noticed that his scales are puffed out from his body and he has a little bit of white fuzzy stuff on him around those scales. I've already taken him out of his tank and put him in a smaller container with fresh water, but what else can I do?
I'll try to get some pics later tonight and post them. Unfortunately, Goober hates the camera, so it might be hard.