I am stoked. I proved it in less than 6 months. When I started this growing venture, I promptly threw away the bubblestones I was handed down, and bough a Bubble Mac Hydroponic Hoss. It was pricey, it's made of expanded silica, it's white. It makes 3 micron tiny bubbles that are double the surface area of blue and green stones.
It has now clogged every 3 months, but unlike the cheap stones, you can fully clean it with muriatic acid, or pH down soak followed by a bleach soak. It has a lifetime warranty, and I have now saved enough to pay for it.