Quite a lot of aquarists beginners face the problem of how to control snails population in a tank (melania snail, ramshorn snail and snails from Physidae family), when their number becomes too big.
So, two questions rise simultaneously: how to get rid of these snails and where did they come from?
Well, if you haven’t put them into the tank on purpose, they could have got into it together with the bought tank plants whose leaves might have had snails eggs on them.
As it’s known many kinds of snails are hermaphrodite species and provided with good feed just one snail may create a thousand species. At that you won’t see snails juveniles, since usually they hide when they are small and then, after they grow up, they start appearing in all their number.