There are some snails that are actually quite beneficial to freshwater aquariums.
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Small Horned Nerite Snails are one of the most popular freshwater aquarium snails these days. Nerite Snails are often sold as freshwater aquarium snails, although there are some saltwater varieties as well. Nerites have a reputation for being an outstanding tank cleaner and one of the most proficient algae eating snails around. Nerite Snails can be described as being docile, peaceful and tranquil in temperament, being able to move throughout the tank with ease.
Ramshorn Snail .:. Planorbis rubrum .:. Freshwater Aquarium Snail Species Information Page
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Freshwater snail I.D. 9/22/11
Hi crew,
Would you mind trying to I.D. this snail for me?
It would appears that some hitched a ride in on some plants that I ordered which have been in a cycling, unstocked (fish) tank for one week. This is the biggest (about 0.5 cm long), but a few more 'babies' seem to appear each day (last count ~10 individuals visible).
Should I remove them or let them be?
I live in Singapore, if that helps your I.D. attempts.
Cheers and thank you so much for your time,

They're basically harmless and feed on algae (diatoms, primarily) and organic detritus. Some people report damage to plants, but I have them in my planted tanks and they never seem to do any noticeable harm. They do breed fairly quickly, laying jelly-like masses of eggs, but they rarely become plagues in the same way as Melanoides spp. snails can do. I think they're rather fun to watch and add character to an aquarium. Cheers, Neale.> Ramshorn Snail .:. Planorbis rubrum .:. Freshwater Aquarium Snail Species Information Page
Photo provided by FlickrRamshorn Snail .:. Planorbis rubrum .:. Freshwater Aquarium Snail Species Information Page
Photo provided by FlickrThe ramshorn snail is a common pest in the freshwater aquarium. Pictured is Planorbella trivolvis.
Photo provided by Flickr
When it comes to freshwater aquarium snails, there are many points of view to consider. There has been an ongoing debate as to whether or not aquarium snails should be seen as beneficial pets or destructive and troublesome pests.Malaysian Trumpet Snails are popular scavengers that are useful for your freshwater aquarium. They will break up plant roots and sand substrate; eat decaying plants, algae and dead animals. These snails will grow to 1 inch, and will need both sexes to reproduce. They will not eat your live plants (unless they are starving) or harm other tank inhabitants.Snails also add movement and color to your freshwater aquarium and they can be fun to watch. There are many different snail species that come in various colors, shapes and patterns and are pleasing to the eye.When you know what to expect, freshwater aquarium snails can be a wonderful addition to your freshwater home aquarium. These hard and slimy workers love eating algae and decaying matter, keep your tank clean, and are great to watch!Because snails lack natural predators, in a freshwater aquarium, snails are prone to multiple rapidly and you must pay special attention to the number of snails you desire to have in your aquarium before it gets out of hand.As for nerite (horned snails), they are a great addition to almost an aquarium. They eat vast quantities of algae, leave plants alone, and are still relatively attractive to look at. Plus they don’t reproduce in freshwater, so their numbers are easy to control.