Question: how many snails in a 1 gallon tank?
Answer: One or two snails would be suitable when setting up a 10 gallon tank. The amount of snails you can have in your aquarium completely depends on how many fish you're going to keep them with. As a rough indication you can include around 1 snail per 5 gallons. They can be kept in any aquariums larger than 5 gallons.