Damn then, I'm not seeing anything. Might have to shake this bugger tonight then.If the pumps on, yes !
Seriously, I have one and find its fine for me, I get a good aeration, and stimulation (is that the correct word)
Works a treat...
I turn mine on before I immerse the head (OMG)
I keep it running when I remove the head from the "wort" and dip it into the clean water to give it good rinse, its a pretty fine stone so you don't want to block it...