On the bank of the river you can collect shellfish without much difficulty. Place in a home aquarium, where they will as successfully live, as in nature with food. You can buy interesting creatures in the pet store. The main task is to provide adequate nutrition. And, often it happens by itself. Snails in the aquarium get along well with the fish. Some calmly swim, others creep along the walls of the aquarium, eat vegetative plaque. They readily use fish food, algal tablets, adore aquarium plants, crushed vegetables. Live snail algae in the aquarium is not touched. It is desirable to regulate the number of mollusks, otherwise the aquarium will remain without vegetation. Mollusks gladly eat rot on algae, plants, than benefit - they make it easier for a person to clean the aquarium. Periodically, it is necessary to add grinded eggshell eggs on the coffee grinder - to replenish calcium in the body of the mollusk.