Why aerate your wort? Yeast needs oxygen to reproduce and produce strong cell walls. If the cell walls are weak, the yeast will have a low tolerance for alcohol, and can die before fully fermenting out the wort. Particularly in worts with starting gravities in excess of 1.050, this can contribute to long lag times, slow ferments, and higher than normal finishing gravities. Like an air stone in a fish tank provides oxygen for fish to breathe, wort aeration provides needed oxygen for yeast respiration and growth.
This Big Oxygen System is the largest Oxygen Aeration System we have, and features a 0 - 4 cfm oxygen regulator, 4' of tubing, and our rigid 22" oxygen aeration wand with a .5 micron sintered stainless steel stone.
The pictured 20 cubic foot oxygen tank is not included - get a full tank of welding grade oxygen at a welding supply with a CGA-540 valve outlet (the welding industry standard).
To use, first assemble the tubing and wand and install the regulator on the full tank of welding grade oxygen you have sourced at a welding supply. Turn on with the regulator set to O and put the wand into your 5 gallons of beer. Turn on the regulator to to 1/2 LPM (liters of oxygen per minute) and let run for 20-30 seconds for worts with starting gravities up to 1.079, and for 60 seconds for worts with starting gravities over 1.080. One fully charged tank will treat at least 250 batches of beer based on this one the 30 seconds at 1/2 LPM setting.
Note: Before ordering, we recommend you call around and locate a welding gas supplier who will provide you with a deposit/exchange tank of welding oxygen, or who will fill a tank that you own. The tank must have an industry standard CGA 540 oxygen valve. Around here, it costs about $30.00 to exchange a 20 cubic foot tank of oxygen at a welding supply. This 20 cubic foot tank is good for adding oxygen to at least 250 five gallon batches of beer.