For cleaning/sterilizing a system, look into the use of Virkon Disinfectant. It has many advantages over bleach. Only draw back is it's around $90 for a 10lb bucket.
-Ryan
Roughly 200 gal in size, under $100 each delivered. Put a layer of epoxy paint over it and they're virtually indestructable. Last forever and they dont get blown away in hurricanes!
-Ryan
