Hi,
Im considering gettting a portable hot tub something like this one:

http://www.amazon.com/COMFORT-LINE-P..._sbs_hpc_img_5

It would be placed on my wooden deck, which is original with the
house, about 20 years old but looks to be in good shape. I'm trying to
figure out if I need to reinfirce the deck. I could put in another
concrete foor right under where the hot tub would be, but i'm trying
to figure out if it is necessary, any ideas? Thanks.