All jokes aside. People don't typically BLOW through bongs. It is customary practice to SUCK through them. Based on that fact, I chose to use a vacuum rather than any form of aeration for percolation. I think the choice to vacuum instead of aerate is further substantiated by the efficiency of pulling (vacuuming) air through, rather than blowing (aeration) through the fins of a radiator.
Just saying...
Shingoshi
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