Tropical Snails for Freshwater Aquariums: Nerita Snail, Olive

Nerita Snails are an efficient scavenger ideal for smaller ponds and freshwater community aquariums
Photo provided by Flickr
One of the reasons as to why the trumpet snail is great for aquariums is because they eat algae like no tomorrow. If you have been then this snail will take care of that for you. Another big problem that these snails solve is substrate aeration.
Malaysian Trumpet Snails (Melanoides tuberculata) can be very beneficial for planted aquariums as they aerate the substrate.
Photo provided by Flickr
Assassin Snails are known to be extremely active. The idea that snails are slow and plodding is definitely challenged by this gastropod. Assassin snails will scale plants, glass, large stones, and wood with surprising speed when hunting for food. I have even seen them suspended upside down on the surface of very still water! Being able to move quickly gives this snail an advantage over slower moving prey items, such as the troublesome pond snail, Physa sp. In large numbers, Physa sp. pond snails can damage soft plant tissue and can present a real problem if you are trying to keep a well-groomed planted aquarium. A handful of Assassin Snails will eventually clear the aquarium of unwanted snails. After the problem snails are eaten, Assassin Snails will take up a somewhat more laid back role by eating left-over fish foods and decaying protein. While some reports of shrimp predation have occurred, it is a pretty rare occurrence. Information on the common Malaysian Trumpet Snail. They are great for all aquariums given several reasons.
Photo provided by FlickrGood Snails for the Aquarium
Photo provided by FlickrKeep reading for everything you need to know about breeding aquarium snails and setting up a snail breeding tank.
Photo provided by Flickr
Just like any other force, snails can be used for good and for evil. They have a reputation of rapidly devouring plants, multiplying like crazy and turning a former fish tank into an unsightly mass of creeping grey slime, but this is only the dark side of the snails. When properly managed, snails can actually do a lot of good in your aquarium. If you introduce factors that balance their numbers, they will settle in to their designated ecological niche in your aquarium and carry out the same beneficial work that they do in the wild. Snails can even be entertaining pets themselves and some of them, e.g. the Mystery Snail, look really beautiful. Will they eat my plants?
Yes, snails do eat plants, but most species actually leave healthy plants alone and prefer to feed on dead and decaying plant matter that would only end up fouling your water anyway. Healthy plants tend to produce cyanides and other poisons and are therefore not appreciated by most snails. There is however exceptions to this rule, e.g. the Pond snail, which should never be introduced to the aquarium since they can rapidly devour even healthy plants. The myth that snails destroys plants probably originates from their habit of settling on dying plants and rapidly multiplying there due to the abundance of food offered by a plant that is already dying. Snails also like to graze on algae growing on plant leaves and this can naturally look as if they are munching away at the plant itself, when they are in fact only ridding the plant of algae. Snails and fish eggs
Keeping the water quality up in a breeding aquarium is often of extreme importance and introducing a scavenger will help you with this. The problem with scavenging fish species is however that many of them like to eat fish eggs. Even fish species that normally stick to an herbivore diet can be tempted by the look of tasty fish eggs. Snails are however much less fond of eating healthy fish eggs and are therefore a good choice of scavenger in a breeding aquarium. Decreasing the food supply
If you experience a snake bloom in your aquarium you might be over-feeding your fish, because left over food is an excellent food source for snails. Watch your fish carefully at feeding time. Is there any food left after 3-4 minutes? Then you are most likely over-feeding your fish and need to decrease their servings. Uneaten food should also be removed from the aquarium after each feeding session if you want to keep the snail population at bay.