Ok, so I've got this figured out, finally. I was scoping out Walmart this a.m when I ran across 2 big cylindrical trash can, 6.6 gallons, and 13 gallons. I was sitting there thinking, so I took off to the fishing zone and checked out the cool bubbles. I've already got the cheapo $6 bubble box, so I figure I'll get the 13 gallon trash can, drill a pair of holes at the top and string a section of rope in there, and then use 2 $6 bubble boxes for aeration. I know 13gallons is big, and heavy, but it beats getting something 6.6 gallons and then lugging around a big ass 12v battery.