It depends on how strong the Tea is. Make sure that the manure has been composted properly. I would follow one of the recipies on this site, mol., humate, ect. and just make a bigger batch. Yes by all means a aerate... 12 hours. The finished product will have a life of about 2 hours. Just dont have a break down in your tractor or spray rig or it will go bad. If you add the Molasses, Humate, ect. I would spray 1 gallon to the acre of tea, usually that would be with 9 gallons or water, or a total of 10 gallons per acre.
Hope this helps,