I skipped all the way to page 5 and you're only just filling the thing???
Wait... that's fast for you. I forgot.
Ha, I was totally going to ask if you were adding salt to that water as it went in or what... Then I realized it didn't matter, with base rock and "dead" sand! Can't wait to see this thing rolling!
Edit: How far was it from the tub with the RO/DI to the tank?! Looks like quite a production there!