Yep, if you have no airstone position a household fan to blow on the top of the water, should help aereate it.
I'm sure i don't need to mention be careful.
water+electricity=dead fish/person
Do a 20% see how he is, do it all at the same time and it may stress him too much.
Leave 15 mins do another etc.
Unless you think he's going to die really soon, if so you have nothing too lose.