Making worm casting tea with a portable hot tub pump

I was wondering if u guys think it would be possible to use this air pump I have with this old hot tub I have laying around? I'm brewing some teas in a 55 gallon drum and unfortunately I don't have the air pumps I need to do the job until I can make it down off the mountain and get some good ones. I just tested out the pump and a does a pretty good job but I don't have any air stones that will fit the hose. It puts off some pretty intense bubbles and just want to know if i risk messing up my tea using it or if you think its a good idea. Heres the pump I'm using, its called a power pack that came with the hot tub "spa n a box"

How many liters per minute does it put out?

I dunno about this pump. Does it by chance have a propeller in it? Also looks like there is a filter, etc.

http://www.activeforever.com/content/manuals/SPA_N_A_BOX_MANUAL.pdf

I realize everyone's situation is different, but here is a Com1 for about $32. I have seen these as cheap as $18, and following MM's instructions can be enough air for a 5 gallon brew.

http://www.amazon.com/EcoPlus-Commercial-Air-Single-Outlet/dp/B002JLJC0W

P-