Air pumps in a shed? (Air quality question)

[Hobbit]

I’m starting outdoor tubs for the first time! 😃 I put them near my shed so I could run an air stone in each tub while keeping the air pump out of the rain.

However I’m wondering if that’s a bad idea. The air quality in the shed can be pretty terrible. Our lawnmower has a small gas leak so the shed usually smells fumey. It also gets really hot in there in the summer.

Is it a problem to pump stuffy fumey air into my ponds? I may be able to put the pump itself right outside the shed and just cover it with some kind of shelter.

[Kirsten]

Good question! Yeah, I'd hang them up outside in that case, maybe under and overhang somewhere? Or cover them with a piece of tarp or wood or plastic?