flush with un pH'd water?

so if i flush a week before chopping, should i pH the water with vinegar/baking soda, or should i just throw the water on without touching it?

i have the same question---does it matter before flushing if you are using PH'd water or can you just flood the medium with whatever?

I ask because, to PH my water, i fill up 1.5 liter bottle add half tbsp vinegar, dump into pot, fill bottle, vinegar dump, etc etc. and if 1 gallon = 3 liters, and you are supposed to use 2x your pot size inw ater. I have 2 gallon pot, so I need 4 gallons water or 12 liters/1.5 liter per water bottle = 8 water bottle fillings/ph balancing before im done flushing one plant

I honestly don't think it's as important to worry about pH during your final flushings (I just watered with plain water) as you do during growth and finishing phases. As long as it's not terribly out of whack I think you'll be alright.