Although there is a probability that an eruption could cause ash to fall in puget sound...it is kind of unlikely. The wind direction that would be needed to carry it to the puget sound is not very likely. Not sure what I would do though...not really something I ever really thought I'd need to prepare the tank for. Power outage...ok, but volcano ash...man, there is always something to think about in this hobby
I still have coffee cans full of ash around somewhere from the May 18 1980 eruption. I was in Packwood at our cabin when it blew. We got about 5 inches of that stuff up there ughhhh it was surely a mess for many months. If you dig down you can still find a layer of it under the dirt and pine needles. There was a cubic mile of rock turned into dust by that eruption though, I don't think it would be like that again since so much of the mountain is gone.......of course you never know I guess.