sino kaya may info kung saan makakabili ng ganito?
here's a link to it. http://www.youtube.com/watch?v=z0PRPdE9uYQ
Notice kung gano kabagal tumaas yung bubbles compared to conventional air stones.
I saw a similar kind sa aquaria manila, the small kind parang CO2 diffuser. pero hindi daw nila binebenta kasi it came with the aquarium.