Jim, you're probably not going to like this, but from the perspective of someone who doesn't own a real aquarium, the new sound in 99k seems less realistic than earlier versions.

The reason I say this is that the bubble sounds seem to include deeper sounds, which seem to me to sound like larger bubbles breaking the surface of the water, but there are no larger bubbles. The old sound just sounded like small bubbles, like there are in the tank.

Of couse someone who owns a real aquarium might say the deeper sounds are caused by something else - comments anyone?