I use a turkey baster to empty my 5 gallon buckets. Suck it up put it in the watercan takes a few times but has worked for me and the less I move my plants around the better.
Must water through? Since when?
Just because H&G say so? And how much do you waste, so you have to run out and buy more. Shit, their drip clean doesn't even work! The Urea based nutrients and the drip clean make a brick out of your soil.
I water a measured amount every day at lights on, 90% NO run through and enjoy nice soft healthy soil. Yes this is on my smaller "combo" grow area. I run Hesi nutrients (no supervit or roots or zyme),GH CALiMAGic, Botanicare Silica,Sea Green and a bit of GH Floralicious + up until the middle of week 3 in flower.