Hey! Sky! Vapir! I found the Korea Dae Yang air stone too! Same store I bought previous air stones.
Also the last piece they have, but damn they sold me at Rm15... It's much much durable than my previous air stones, but weaker than my white corundum. Wicking, not bad at all, but white corundum is still a winner. With additional 2 grooves on it, it really wicks awesome! But not "true" wicking, the
juice does fall(wick) better in the channels if you tilt a little. And no leaking issue.
Here the picture of Korea Dae Yang channeled wick.