Alrighty so recently I've been given a large amount of small to mid-large algae eating snails. I'll be 100% honest, I don't really know what they are, and neither does my friend who gave them to me (I know, rookie mistake taking something without knowing what I was getting myself into). What I do know, is that my dwarf puffer LOVES them, and they're definitely awesome clearers! To give you an idea, I have a small 3.5 gallon betta tank, and a while back it was absolutely covered in algae. Then, I put 12 of these snails in there, and within 24 hours the tank was almost as nice as it was when I first got it. I made the mistake of overfeeding which resulted in a population boom. Obviously these are free, although Id appreciate it if you could identify what they are because they do not look like Pond snails, and I'm not sure what else they might be. If you're interested, send a PM. Pictures can be provided through email. Thanks!