The bulk update request #13063 is pending approval.
create alias one_balloon (4) -> balloon (6177)
create alias multiple_balloons (94) -> balloon (6177)
Reason: I don't think the utility of making these countable is big enough to justify the addition/maintenance of these tags, added by a single user.
In addition, balloon_fetish is largely coincidental with images that only have one balloon, and the mere existence of secondary balloons does not seem significant; every one_balloon post could have a handful of ambient balloons added in the background and their content would not significantly change. balloon -balloon_fetish -living_inflatable includes a lot of instances of non-focal groups of balloons (birthdays, parties, etc.), it's not perfect but it's probably a good enough start for a private set.