Bump cause I got another question......

I flushed them today with distilled water because I noticed the leaves were starting to turn yellow but then checked the ph and it's around 9-10 for most of them. I just ordered some ph Down but in the meantime I read that vinegar can be used for a short term solution. Has anyone else heard of that or any tips on how I can lower it till I get the ph Down delivered? Thanks alot and any help is greatly appreciated.