Wow, take a day away from the computer and all kinds of stuff goes on. Thanks for all the input guys.
I think we'll be shooting for the footings with support posts. The question I have about these is are the jacks a good long term solution?
Another question is how do I know if the floors are tongue and groove or not? I may have to get pictures of the floor to show you to see where the grooves are and such, but I won't really be able to do that for a week or so.
When I was thinking about what to do to support the floor I was thinking along the lines of what guyod and ToolGuy were describing, which makes me feel I am not totally out of my league with this. Though now I know what to do If I wanted to put a 10,000 gallon tank in.
There are no closets on the new part of the house, just a living room (which is where we want to put the tanks) and a kitchen with a small wall between them, there is a small, about 10' wide, dining area that connects the living and kithen areas (this area also has the wood floors). The living area has hardwood floors and the kitchen has tile. My question here would be in what area would be best to put the access into the crawl space?
Thanks for all the help.