I've been at college for a few months and my mom has been taking care of my fish. I am home now, and I found some things I don't like to see.
I had bought some java moss and introduced it into the tank before leaving. I think I might have let some stuff hitchhike its way into my tank. So now, there is this translucent, curled up things around my tank. They have antennae like in snails but I am not quite sure what these are (but they do look a lot like snails). I also have this blue-greenish thing growing on one of my rocks but I guess that isn't much of a serious issue. Could you guys help me identify what these suckers are?
Here are some pictures: