Two possibilities with the blower - either the blower simply went bad (motor running hence the sound, but no fan spinning or blowing air) or the blower simply fell off the blower line - that happens from time to time. You should look at the blower to see if it's still attached to the plumbing, if it is, you will need to replace it.
Finding a replacement blower is easy, just match the voltage and horse power to one on this page:
http://www.spadepot.com/shop/Spa-Air-Blowers-C151.aspxThe ozone bubbles are likely not related, and the ozone line itself is likely clogged. I would suggest looking at the plumbing line for the ozonator, if it's yellowed or cloudy, replace the plumbing.
Hope this helps!
