Premium 200mm Green Carbon Round Air Stone for Koi Ponds & Aquariums

High-density porous carbon construction ensures ultra-fine bubble diffusion for maximum oxygen dissolution

Precision laser-drilled micro-holes deliver uniform aeration with whisper-quiet operation

Naturally antibacterial carbon material prevents algae buildup while maintaining water clarity

Specially designed for high-oxygen-demand environments: koi ponds, breeding tanks, and marine setups

Rounded edge design with reinforced ceramic core prevents cracking under heavy-duty use

Compatible with all standard air pumps (0.5-3W recommended for optimal performance)

Non-toxic, BPA-free materials safe for delicate fish including koi, goldfish, and tropical species

Industrial-grade durability withstands continuous operation in commercial aquaculture applications

Pre-tested for consistent bubble output (produces 500-800 bubbles/minute at 2W power input)

Each stone undergoes 12-step quality control including pressure and abrasion resistance tests