So you want to use a fogger ? no drip or bubble? The fogger its self i would think would be the highest... Cheap would be bubble, 4 buckets, 4 net pots, lava rock.....Last time i bought a fogger for my 200 gal. frog tank it was like $50 + i think , 2 air pumps would be cheaper....sorry if this doesnt help much ...peace