The Aquarium Fish Tank Bubble Air Stone Stick is a must-have accessory for your fish tank. It helps to increase the oxygen levels in the water, creating a healthier environment for your aquatic pets.To ensure optimal performance, please follow these instructions: Before use, soak the air stone stick in water for 15 minutes. This helps to remove any impurities and ensures proper functionality. If the air bubbles are reduced or the dirt is blocking the stone, simply take it out and clean it for repeated use.The length of the air strip varies depending on the size of your fish tank and the wattage of your air pump. For tanks with a length of 10-30CM, a 2W air pump or higher is recommended. For tanks with a length of 40-60CM, a 3W air pump or higher is recommended. Please note that the wattage of the air pump affects the air outlet effect, so a higher wattage pump will provide better results.Please note that this product is only the air stone stick and does not include an air pump or air pipe. It needs to be used in conjunction with these accessories. The pack includes 4 air stone sticks, each measuring 16*1.5CM. The sticks are available in green and blue colors. Please be aware that there may be slight color and size differences between the photos and the actual product.Key Features:Increases oxygen levels in the fish tankEasy to clean and reuseSuitable for tanks of different sizesRequires an air pump and air pipe (not included)Pack of 4 sticksMeasures 16*1.5CMAvailable in green and blue colorsDurable and long-lasting