Not to get to far off topic but what if you were using a python? That adds water right into the tank so how are you supposed to treat it first, or do you just empty with it and fill with buckets? Or add chemicals as you go?
Yeah I don't agree with his quote. I use a python on my larger and smaller tanks and I just dump in some dissolved safe within 30 seconds or so of the tap turning back on into the tank. Never had any issues from doing so, even when I used prime and the not-so-great voogle-equivalent.