our bass club uses 3 of the same size tanks for weigh in and just use commercial minnow pumps for the water circulation, with the air stones from the livewell pump it will put alot of air in the water. I use the system in my livewells and am impressed with the amount of air it puts out.
if recirculating the water with some please release me and the air stones we have never had a problem, in hot weather we add ice as needed and monitor the water temp with a drop in thermometer "airguide model from academy".
for more air output look at wally world for the small 2 tank campbell hausfeld compressor, about 75.00, this runs on 120v but can be regulated down to about 5 psi and that should be enuff to feed 5-6 stones just use the 25 or 50' coil style 1/4" hose and build a manifold out of 1/2" pvc. if you use larger pvc you will drop the air pressure and not be as efficent. I also own one of these and carry it on my truck for emergencys with a 1000 watt inverter, comp draws abuout 2 amps so a 500 would work too, if you dont have a power source handy.
sorry so long winded but hope this gives you some ideas.
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Hop, you sir are a freaking GENIUS. Muchas gracias.