PACKAGE INCLUDE - You will receive 30PCS air stone, each stone measures 4.5 x 0.8 x 0.5 inch and weighs 1 oz. And its cuboid shape allows it to lie steadier than other shapes in the tank.
MINERAL MATERIAL - The air stone is made of natural mineral material with a green plastic base, sturdy and non-toxic materials are safe for your fish.
IMPROVE THE WATER ENVIRONMENT - The air stone bars produce an abundant cascade of bubbles which could increasing oxygen and water currents in your aquarium or fish tank.
EASY TO USE - Soak the stone bar completely in water 1 hour before use. When it is clogged with dirt or creating bubbles in a low rate, please wash it before reuse.
PERFECT COLOR - Air stone can be positioned anywhere to decorate in your fish tank. Blue color blends in with surroundings or it can be hidden under gravel.
