I just pulled out my sweetwater stone in favor of the rhinox Tom was talking about and it works much better.. the rhinox collects bubbles in a chamber under a disc of material similar to that used in sweetwater stone.. the result is finer more spread out bubbles that my power head sucks up easilly .. I made the change this weekend and the result is a much finer mist around the tank.
I got the diffuser on ebay .. found a "best offer link" and bid 15.. the auction that closed a few days later went for 12 so they are cheap. The hardst thing is the seller is in malyasia so it took nearly two weeks to get it, but I am very happy with the results.
Tom, once again, thank you!