I have my fresh build filling with water now ... it's slow going due to using only a single garden hose. However, this is giving my time to figure out a few things dealing with the plumbing. This is a 27'x52" AGP and it's only got about 10" of water in it now (been filling for 15 hours). 3,500 gallons in thus far. At which point do I begin to consider hopping in and installing the skimmer & return and plumbing up the filter/pump? I have heard 1/2 way full, I have also heard 2-3 inches below the skimmer/return holes ... is this something I can do now or is it way too early?