Just got a new aeration set-up from More Beer with the stainless steel diffusion stone.. I have always splashed and shaken my wort before, but I am excited to try out this new method.. So how long do you guys who use them let them bubble in the wort? Any truth to the fact that the aquarium pump method destroys head forming proteins and leads to less of a head? (Jamil Zainasheff mentioned this on the aeration episode on BrewStrong..)