i was wondering what you ended up using. you mean like the thin rubber sheet type or the the kind that comes on a roll? i just got my bigger pump. it seems they ran out of the ones i ordered so they sent the commercial version for the same money.
this thing isnt a pump its a compressor, what a beast. 30 lpm higher output. we'll see what that sounds like once i get it all set up. maybe ill try it out on my little bubbler.