Aquashella was like nothing else I've been to. It was VERY targeted towards hobbyists, and really highlighted/showcased YouTubers/influencers--as in they were treated like rockstars. There were tons of vendors, but it was saltwater AND freshwater...plus art. Which was, well, *interesting*. Their attendance numbers are very impressive.
Aquatic Experience is more of a B2B tradeshow that the public can attend. Since moving to NJ the attendance has been a fraction of what it was, but still a decent show. It's still the only show that has an official live aquascaping event (if that matters to anyone but me
Superzoo is another WPA event, in Vegas, not aquatic specific, and more B2B. Must be a business (or representing a business) to attend.
Global Pet is the big tradeshow in FL, but you have to be a member or business to enter (Strictly B2B).
There's Reef-A-Palooza and MACNA, but those are marine shows.
I'm not aware (but that's not saying much) of any pond specific shows... but wouldn't be surprised for a second if there was one (or more).
It is not murder if you're killing snails.