I am new here and doubt I am following protocol, but don't know how to make a comment on an answer and not provide my "own answer"
Just to add to YDK's answer, some say you should only follow this minhag 11 months after the loved one's death, similar to saying how someone says kaddish for a relative for 11 months, unless you mean to suggest they were the worst type of person and needs the 12 months in gehenna before entering olam haba.
A quick question-- does anyone think this minhag against drinking water between mincha and mariv applies to seltzer as well? Coul you give me a halachic reasoning?
Thanks for this awesome site!