Air Stones for Ponds 2 Inch, Long Lasting Aerator Oxygen Differ, Air Pump Accessories for Aquariums, Fish Tanks, Hydroponics and DWC Reservoirs 4 Pack

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Fine bubble: Compared with ordinary bubble stone, creating more fine bubbles, makes the dissolved oxygen amount larger Widely applicable: Suitable for hydroponic systems, aquarium fish tanks, preventing ponds freezing in winter, helping extend the life of your nutrient solution, keep fish/ roots healthy and promote plant growth Air Stone Dimension: 2 "D; Connector Diameter: 3/16"/ or 3/8"; Recommended air pump power: > 4 W Quality material: Made of mineral material and sintered at a high temperature; Stable and durable, long lasting e; Safe to your fish Note: You have to soak it in water for about 30 minutes before connecting to an air pump to run it; Clean it after a period time of e Delivery Timeframe Please note that we cannot guarantee the exact date of arrival, and the delivery timeframes (excluding weekends and public holidays) are as follows: For customers in Victoria, approximately 7-10 working days; For customers in NSW, SA, ACT, and QLD, approximately 9-12 working days; For customers in WA, NT, and TAS, approximately 9-12 working days.