Just recently I discovered these beautiful Red Footed Snails at the LFS. They are also called Mexican Red Foot or Norrisa Top Shell, and are reported to consume green hair algae and cyano bacteria. Why don't we all have these?!? Quite expensive at $5 each, they do better in cooler water (below 78F) so time will tell if they survive in my tanks (high of 81F). The bright red is a real eye catcher, contrasted by a black mouth and white foot.