Well I finally got the catfish live tank finished for my boat. It has the capacity of 100 gallons and is fully insulated. I started out with a 100 gallon galvanized tank I custom made a lid out of 1/2" thick white cutting board and insulated the outside with 1/2" thick white minicell foam. All stainless steel hardware with fresh water pickup and a standpipe to control water level and for quick draining. I also have a 12v air bubbler on it. I may add a recirculation pump on it if I feel neccesary later. Here are a few pics.