SNAILS are good scavengers in the aquarium and for this reason most tanks have one or two. They eat some of the excess food on the bottom and keep the glass sides of the aquarium free of algae to the best of their ability. Since they are known as plant eaters, it is not wise to put them in an aquarium with delicate, expensive plants. The only snail that will not touch plants is the Ampullaria cuprina or MYSTERY SNAIL, very popular for this reason and also because it is an excellent scavenger. Other types include the RED RAMSHORN, COLOMBIAN RAMSHORN, AUSTRALIAN RED, AFRICAN PAPER ShELL and the Common pond snail, that propagates rapidly. All species are hardy and spawn in the tank. However, fish will eat spawn unless measures are taken to prevent them.