Ramshorn Snail added a natural look to your Aquarium, they don't eat your Aquarium Plants or harms anything. Their numbers can be controlled by spotting and removing eggs from glass. Also as long as you don't overfeed your tanks, that they stay at a nice population. All they really need is clean water, room temp water, and things to crawl on. They love real plants but are find with plastic, too. They are super peaceful and don't bother any other aquatics, but do note that some fish will try and eat them. They are  little hoover vacs and work really hard to keep your tank sparking clean. They nom on dead plant material -- you might see them 'eating' plants, but they know when a part of plant is about to die and will only nom on that leaving you with healthy looking plants -- they also will feast on leftover fish food.