[kgs]

I have an aquarium pump and a stone, but have gone back to whisking 5 minutes with a 24" stainless steel whisk. I suspect this is unnecessary (since sometimes I just pour, and all is well) but it is excellent upper arm exercise. The whisk makes three appearances in my brew day: stirring the mash (where it does a great job of breaking up potential dough balls), whirlpooling the wort during cooling (also great for this task), and aerating. This whisk gets a lot of use elsewhere in my kitchen.

[purduekenn]

I used to used to use a oxygen stone but within the last year I quit that practice. And started to use a simple  Siphon Spray Wort Aerator that attached to the end of the transfer hose out of the brew kettle. The beers have turned out fine and it is simpler than using a O2 tank and a stone.