I've taken to emailing places about it. Only one out of two answered my question so far, but they said yes, so that's cool. I just wish I lived closer to that place so I could go there more frequently! Not only is it tail-friendly, but they have deeper areas so I can practice diving and tricks. But it's a forty minute drive, and I already do so much driving during the week for work.

My neighborhood pool took no issue with my monofin or my test tail.

My gym pool allows it, but they use way too much chlorine so I don't like to go very often. I imagine that most gym pools would allow it, since they're usually lap pools and you wouldn't be getting in other people's way. Plus there wouldn't be concern about the safety of children, since kids aren't usually allowed.