This week I received my Wollemi Pine. I have three questions: 1) Is spring water (bottled) or tap water (clorinated) preferable?; 2) The excelsior used to contain the potting soil, should it be removed?; 3) If I go on vacation for two weeks - I have used the Blumat Jr system (water delivery through a ceramic cone via a small tube drawing water from a source, a siphon or capillary action) - The water delivery can be adjusted to keep the soil moist and not soaked - Would the Blumat Jr be satisfactory for a short time (two weeks) for the Wollemi Pine?