【Hardware】 made of high quality plastic and high quality sand, it is solid and durable and can carry oxygen more efficiently. 【Features】 The rising air bubbles improve Ventilation and flow of water in the aquarium. Can be used for decorative and functional bubbles. 【Long life】 It can be reused and cleaned for a long time, offering good and stable ventilation for your tropical aquarium. 【Perfect performance】 should be used with an air pump and a trachea, with good performance (not counting the air pump and the trachea), it is a necessary tool to succeed in maintaining water and fish during Breathing. 【wide range of applications】 4 pieces of a length of 10cm and 20cm respectively. Very suitable for your aquarium or aquarium, as well as the best partner for the air pump. The description: - This is the best partner for the aquarium, the Aquarium and the air pump to increase the oxygen content. - Before use, completely plunge the air stole into the water for about 15 minutes. - You need of
