Heres some diffrent ways to remove them if thats what you choose to do.
Snail Removal:
1. Spend a little time every day, once you first find the snails, pulling them out by hand. If you crush their shells many fish will swarm over to eat the dead snail. Or you can just throw them away.
2. My least favourite method is the addition of copper to the tank. Copper additives can reduce the snail population, as the element is toxic to most invertebrates. As an alternative to a copper based medication, some people will add pennies to their aquarium to increase copper levels. However this can be dangerous to your fish since you do not know what might be on a penny. Only use related medications as a last resort and also remember to remove the carbon from the filter when adding any medication.
3. Snail eating fish can also be helpful. Freshwater puffers (most of which are actually brackish water fish and need a little salt in their water and are typically very aggressive) will eat snails, as will some cichlids, and most Botia. The Clown Loach, Yo-Yo Loach, Dwarf Checkered Loach, Skunk Botia and the Bengal Loach are all Botia that may be found in a community tank and will eat snails. Remember when adding a fish to the tank to help with a problem like this that the new fish does contribute to the tank population. You could also add an apple snail that will do the same thing as the other fish if you do not have the size tank for a loach or a puffer
4. Possibly the best and most favoured method to remove snails in larger groups is tempt them with food. After the lights go off for the night and the tank is dark, place a jam jar on the substrate at the bottom of the tank with a piece of lettuce or cucumber in the jar and leave for a couple of hours or overnight. When you come back there will probably be several snails attached to the food in the jar. Remove the jar with the snails and throw away. Repeat over a couple of nights and remove whatever snails you see and you cannot go far wrong. You can similarly use spinach, scallions (green onions) or other fresh vegetables to do this and it is useful to anchor the vegetables to the bottom of the tank using, for example, a lead weight.
4+.Another, incomplete, method is to tie a piece of lettuce to a rock, then drop it in the tank. In the morning, there should be snails covering it. Remove the entire piece of lettuce, put it in a zip-loc bag and throw it out. You can repeat this as many times as it takes until there are no more snails on the lettuce (though there will still be snails in the tank). Feel free to contact me if you have any questions.
5.I have killed snails by moving the fish to a 5 gallon bucket, lowering the water level to about 1 inch (10 gallon tank), and dumping in 2 cups of salt. Let it sit for about 5 hours and carefully scrub the tank walls with the salty water (to kill any eggs). After that, completely drain the tank, refilling it as many times as it takes until there is no salt left. Then, fill it about 1/2 way with dechlorinated tank water, add the water the fish are in, and slowly add the fish back to the tank. It may seem excessive, but is sure does work. ;~)
links
http
/www.petfish.net/articles/Invertebrates/snails.php
http/www.myfishtank.net/articles/freshwater-snail-removal/
