Air Stone Ceramic Round for Aquarium and Ponds Heavy Duty

• Heavy Duty
  
• Fine Bubble Size
• Weighted to Sink

These are one the best air stones out there that money can buy. They are weighted to sink naturally and can be washed if they ever were to clog. Instead of replacing a cheap ceramic air stone every 4-6 months as they get worse and worse for bubbles, install one of these once and nearly never worry about it again.