Penn Plax Bonsai Tree Aquarium Decor - Small 4 inch tall Penn Plax Bonsai Tree aquarium ornament Small bonsai tree ornament perfect for betta bowls and tiny tanks Our poly resin aquarium ornaments are fish and aquatic plant safe Add a touch of nature to your fish's home without the hassle of a real plant Penn Plax's poly resin ornaments are washable and will not alter the color or chemistry of your fish tank's water