Eterspr Pack of 6 Aquarium Air Stone Ball, Aquarium Air Stone, 4 mm / 8 mm Hose, Connectable, for Ponds, Aquariums and Fish Tank

• Durable material: aquarium air stone ball is made of high temperature resistant sand and gravel, sturdy and non-toxic, and can be safely placed in your ponds and aquariums. Suitable for connecting 4mm / 8mm tubes.
• Easy to clean: aquarium air vent is easy and convenient to clean, just brush off the surface every month and clean it regularly to prolong its life.
• Stable Bubbles :Aquarium air stone has a flat design with a high density of air holes to ensure the uniformity and stability of the diffuser bubbles.
• INCREASED OXYGEN - Bubble stone for ponds increases the oxygen content of aquarium water, reducing CO2 concentration and keeping the fish and shrimp alive.
• Wide range of uses: air stone balls are ideal for use in ponds, aquariums, wind tanks, fish tanks, aquacultures, etc.

Description: 1. The aquarium bubble stone is easy to install and remove. 2. The aquarium bubble stone creates a constant stream of tiny bubbles that effectively distribute oxygen in the aquarium. 3. Soak the bubble stone in water for one hour before use. Technical data: Material: sand and gravel. Colour: grey. Sizes: 40mm/1.57in (diameter) Package includes: 6 x aquarium air stone ball. Note: 1. Due to manual measurement, there is an error of 1-5 mm, but does not affect the use. 2. If there is a problem, customer service will be available for you within 24 hours.