This little guy got sucked into my filter and didn't think he was harmless and ended up adding him to my tank. I couldn't identify this thing and so far from the description I gave, people believed it to be some type of snail. He looks like rollie pollie with two horns, and no larger than a centimeter. It had cast all these webs all over my rock and decided that I didn't want him in there anymore. Does anyone know what this little guy is and what his purpose is (harmless/not harmless)? Thanks