Here's a good start, http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Number=95836&fpart=1

Meadowlark used an old hot tub with success, search for his thread on the subject. Theo Gallus has done some work with cold water species as well. Maybe search RAS (recirculating aquaculture system)

It'll likely stink up your garage and you'll have a lot of moisture build up = rusty tools but you may be better at it than I.



"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge." Stephen W. Hawking