HISIN Aquarium Air Stone Circle Shaped 63×33 mm – Fine Bubble Airstone for Fish Tanks & Hydroponics, High Oxygen Diffuser with PVC Casing

The HISIN Aquarium Air Stone (Circle Shaped, 63×33 mm) is a high-performance aeration accessory designed to improve water quality and create a healthier environment for fish, plants, and beneficial bacteria. By releasing a steady stream of fine, dense micro-bubbles, this airstone increases oxygen solubility while helping reduce excess carbon dioxide in aquariums and hydroponic systems.

Constructed with a blue porous stone ring encased in a durable PVC outer shell, the airstone is built for long-term underwater use. Its round design promotes even bubble distribution, improves water circulation, and helps prevent stagnant zones at the bottom of the tank. The mist-like bubbles also enhance the visual appeal of your aquarium.

Designed for easy installation, the HISIN airstone features a standard inlet nozzle that connects seamlessly to most aquarium air pumps using common airline tubing. Its weighted structure ensures it remains securely submerged on the substrate during operation.

Key Features

• Produces fine, uniform micro-bubbles for efficient oxygen exchange

• Enhances oxygen levels and helps reduce CO₂ buildup

• Improves water circulation and prevents dead spots

• Creates a visually pleasing bubble effect

• Durable PVC casing protects the porous stone

• Weighted design keeps the airstone stable underwater

Product Specifications

• Brand: HISIN

• Shape: Circle / Ring

• Size: 63 × 33 mm

• Material: Porous stone with PVC outer casing

• Color: Blue stone with orange casing

• Connection: Standard air hose inlet

Usage Instructions

1. Soak the air stone fully in clean water for 15–60 minutes before first use.

2. Connect to an aquarium air pump using standard airline tubing.

3. Place the airstone at the bottom of the tank for optimal bubble distribution.

Maintenance

• Rinse periodically to remove debris or algae buildup

• Washable and reusable for long-term use

Suitable For

• Freshwater and saltwater aquariums

• Fish tanks, shrimp tanks, and planted tanks

• Hydroponic systems and water features

This HISIN Circle Aquarium Air Stone is an essential accessory for maintaining high oxygen levels, improving aquatic health, and adding lively movement to your aquarium setup.