One of the largest Plant safe pet Aquarium snails, mystery snails have lively personalities and make great Aquarium pets! They pair perfectly with SpongeBob Aquarium decorations!These fascinating invertebrates help clear off glass, aquatic plants, aquarium decor, and aquarium substrate. A 13 to 20 gallon tank is generally large enough for 5 mystery snails.They can grow to over 2 inches - one of the largest freshwater snails available! They eat leftover fish or Tetra Food, fish pellets, and blanched vegetables.Black mystery Snail shells range from a black to dark purple, sometimes featuring Tan or gray stripes. They are peaceful and great tankmates to most freshwater fish, including guppies and rasboras!Basic fish Aquarium supplies required, including a fish tank Filter. All Aquatic Arts brand Plants and animals come with a 100% live ARRIVAL guarantee, plus free email support!