Swine Thanks..good to know about the hose, I think it started leaking after it cooled down cause I know it wasn't leaking before.
Don't need to see mice to know they were living there. Plenty of evidence, large leaves-chewed foam-droppings and stink inside the pump chamber. Found more chewed foam under the deck too. I live out in the country, mice are in all the outbuildings and other hidey places. Spa's perfect cause it's deck sheltered from the dogs and warm too.
There's been a chipmunk hiding under there too since I put mothballs in the snowmobile shed this spring. Mothballs going under the spa deck too once I get it back together.

I actually think the chippie is what was the beginning of the larger leak.
Do you know how TG attached their sheathing? I see no access screws attaching it, so I imagine that it's stapled and 'glued' on with the foaming. I really don't want to tear into that at this point. Plus I think I should take a look at the bottom anyway. Probably chewed up and there's some rotten wood under the edges.
So any advice on tipping that puppy?