A quick fly sparging question.

[simple one]

I have always fly sparged. And when I was first taught how to do it, I was always under the understanding that the grain bed was to be moist, but not underwater. To float the grain bed seems almost against everything I was taught. Surely if it floats, the path of least resistance becomes the edges of the tun? Surely it should be wet enough to be compacted enough to not crack, but not under an inch of water and "floating". Most people on here seem to have there sparge water as nearly as deep as a batch sparge.

Which is right, which is more efficient?

[simple one]

Cheers Chris.
I usually have the water/liquor line on the grain bed, sometimes slightly below. I have done it with about a 1/2 inch above when I can't be bothered to keep an eye on it.

I know its not the most important thing in the world, probably only affecting a couple of points of the SG. But just interested to find out the opinion of the masses.

[Chiltern Brewer]

I posted a response here and I then spotted your separate topic.

[GARYSMIFF]

I like to Swirl mine, that said it won't help you sorry